How to Clean Windows: A Complete Residential and Commercial Guide

INTRODUCTION

To clean windows without streaks, use a clean microfiber cloth or squeegee, a good glass-cleaning solution, and work from top to bottom in straight, overlapping passes. Avoid direct sunlight while cleaning, and dry edges immediately to prevent water marks.

This guide covers everything you need to clean windows properly, including the right tools and solutions, step-by-step methods for inside and outside glass, how to clean tracks, frames, sills, and screens, how to remove hard-water stains and stubborn marks, and how to safely reach high windows. It also explains the difference between residential and commercial window cleaning, and when a professional cleaner makes more sense than DIY.

Whether you are cleaning windows in a home, apartment, office, or commercial building, this guide provides practical answers for every situation.

What Is the Best Way to Clean Windows?

The best way to clean windows is to use a squeegee or a clean microfiber cloth with a diluted glass-cleaning solution, working from top to bottom in controlled strokes, and drying the edges immediately after each pass.

This method works because it removes dirt without pushing water back across clean glass. A squeegee clears solution in one controlled pass. A microfiber cloth lifts and traps particles rather than spreading them. Both prevent the streaking caused by dirty water drying on the glass surface.

The best window cleaning method follows four stages:

1. Dry removal — remove loose dust, cobwebs, and debris before applying any liquid
2. Wet wash — apply cleaning solution and scrub the glass surface
3. Squeegee or wipe — remove the solution in controlled, top-to-bottom passes
4. Edge dry — buff any remaining water from edges and corners with a clean cloth
   

Skipping the dry removal stage is the most common reason cleaning leaves smears. Dust mixes with liquid and creates a thin film that dries unevenly on the glass.

Temperature and light also affect results. Cleaning windows in direct sunlight causes the solution to dry before you can wipe it off, leaving streaks. Overcast days or early morning are ideal conditions for window washing.

Tools and Supplies Needed to Clean Windows

The right tools make window cleaning faster, safer, and streak-free. Using the wrong tools, paper towels, abrasive cloths, or worn squeegee blades can drag dirt across the glass and cause scratches or smears.

Essential Tools

Tool	Purpose
Squeegee	Removes cleaning solution from glass in clean passes
Microfiber cloth	Buff edges, removes residue, dries frames
Window scrubber or mop	Applies solution and loosens dirt on larger panes
Bucket	Holds diluted cleaning solution
Soft-bristle brush	Cleans tracks, frames, and sills
Extension pole	Reaches upper windows from ground level
Lint-free chamois	Optional, useful for final polishing on large commercial glass

Cleaning Solutions

What Not to Use

• Paper towels — leave fibres and lint on the glass
• Newspaper — historically used, but inks in modern papers smear and stain frames
• Abrasive sponges or scourers — scratch glass surfaces permanently
• Bleach directly on glass — damages seals and frames over time
• Undiluted ammonia-based cleaners can damage window seals and tinted glass coatings
• Dry clothes on dry glass — generate static and attract dust back immediately

How to Clean Windows Step by Step

Cleaning windows properly takes less than ten minutes per standard window when you follow the correct sequence. The key is to prepare the surface before applying the liquid and to remove the solution before it dries.

Step 1: Gather Your Supplies

Assemble your bucket, squeegee, scrubber or cloth, cleaning solution, and a dry microfiber cloth before starting. Switching between tools mid-clean causes the solution to dry on the glass.

Step 2: Remove Loose Debris

Use a dry brush or microfiber cloth to wipe dust, cobwebs, and loose dirt from the glass surface, frame, and sill. This prevents grit from scratching the glass during the wet stage.

Step 3: Prepare Your Cleaning Solution

Fill a bucket with warm water and add your chosen cleaning agent. For standard residential windows, a few drops of mild dish soap per litre of water is sufficient. Avoid excess soap; heavy suds are harder to remove and increase streaking.

Step 4: Apply the Cleaning Solution

Use a window scrubber, sponge, or microfiber applicator to coat the full glass surface. Apply the solution from the top down. Pay extra attention to corners and edges where grime accumulates. Allow the solution to sit for 20–30 seconds on heavily soiled glass to loosen dirt.

Step 5: Squeegee or Wipe

Using a squeegee:

• Start at the top corner and draw the squeegee horizontally across the top edge
• Continue in overlapping horizontal or vertical passes, wiping the blade with a clean cloth after each pass
• Finish with a final stroke along the bottom edge

Using a microfiber cloth:

• Fold the cloth into quarters
• Wipe in a consistent Z-pattern or straight vertical passes from top to bottom.
• Refold to a clean section of cloth when one section becomes saturated

Step 6: Dry the Edges

Use a dry microfiber cloth or chamois to absorb any solution remaining in the corners and along the frame. This is the most important step for a streak-free result water left at the edges runs back onto the glass as it dries.

Step 7: Inspect and Buff

Stand back and inspect the glass in different light angles. A torch or phone light held at an angle to the glass surface will reveal any remaining streaks, smears, or missed spots. Buff lightly with a clean, dry cloth.

How to Clean Inside Windows

Inside windows accumulate grease, dust, condensation residue, and fingerprints. These deposits respond well to lighter cleaning solutions but require more care to avoid dripping onto floors, furniture, or window sills.

Before cleaning interior glass, lay a dry towel along the window sill to catch drips. Wring the scrubber or cloth well before applying the solution to avoid excess liquid running down the glass.

Interior window cleaning steps:

• Dust the glass and frame with a dry microfiber cloth first
• Apply a lightly dampened microfiber cloth or scrubber with diluted glass cleaner
• Wipe in vertical passes from top to bottom
• Squeegee or wipe dry immediately. Do not let the solution sit on the interior glass
• Buff edges and corners dry with a separate clean cloth
• Clean the sill and frame last to avoid re-contaminating the glass

Interior glass near kitchens picks up airborne cooking grease. For greasy interior windows, add a small amount of isopropyl alcohol or a stronger dish soap solution before washing. Alcohol dissolves grease more effectively than water or detergent alone.

For condensation marks and white haze caused by moisture, a white vinegar solution (1:1 with water) removes the mineral film left by evaporated condensation droplets.

How to Clean Outside Windows

Outside windows face rain, wind-carried dust, pollen, bird droppings, pollution, and oxidised mineral deposits. They typically need a heavier pre-wash and more solution than interior glass.

Exterior window cleaning steps:

1. Rinse the glass with clean water first, using a hose or a wet cloth to remove loose surface debris
2. Scrub the full glass surface with a window scrubber and cleaning solution, paying attention to corners, edges, and lower panes where soil accumulates.
3. For stubborn marks, allow the solution to soak for 30–60 seconds before scrubbing.
4. Squeegee in horizontal passes from top to bottom, wiping the blade after each pass
5. Dry the edges and frame with a clean cloth
6. Inspect for streaks and buff clean

Bird droppings contain uric acid and bond firmly to glass if left to dry. Apply cleaning solution directly to dried droppings and allow it to soak for at least one minute before wiping. Never scrape dried droppings with a hard implement, as this scratches the glass. Use a soft, damp cloth with a soaking solution.

For ground-floor exterior windows with heavy oxidised mineral deposits from sprinklers or rain splash, a specialist calcium, lime, and rust (CLR) remover applied before the standard wash will dissolve the deposit without requiring abrasive scrubbing.

How to Clean Window Tracks, Frames, Sills, and Screens

Window tracks, frames, sills, and screens are the most neglected parts of window cleaning. Dirt and moisture trapped in these areas re-contaminate clean glass within days of washing.

Cleaning Window Tracks

Window tracks collect compacted dust, dead insects, mould, and moisture. Use a dry brush or old toothbrush to dislodge debris first. Then apply a small amount of cleaning solution or undiluted white vinegar directly into the track. Allow it to soak for two to three minutes, then scrub with a stiff brush and wipe out the loosened debris with a damp cloth. For very clogged tracks, a cotton tip or a bamboo skewer can help extract dirt from tight corners.

Cleaning Window Frames

Aluminium, uPVC, timber, and powder-coated frames each require different care. For most frames, a damp microfiber cloth with mild dish soap is safe and effective. Rinse with clean water and dry immediately to prevent water marks on the frame surface.

Avoid using strong bleach or ammonia cleaners on painted or uPVC frames, as they can degrade the surface coating over time.

For timber frames, do not allow water to sit on the surface. Wipe dry immediately and check periodically for any signs of moisture, swelling or paint lifting.

Cleaning Window Sills

Sills accumulate dirt, mould, paint flakes, and moisture. First, wipe away loose debris with a dry cloth. Apply cleaning solution and scrub with a soft brush along the full length of the sill. Mould on sills responds to a diluted white vinegar solution or a specialist mould cleaner. Rinse and dry thoroughly. Regular cleaning prevents mould from establishing in the sealant around the sill.

Cleaning Window Screens

Remove window screens from the frame before cleaning, where possible. Lay the screen flat on a clean surface or against a fence. Use a soft brush and mild soapy water to scrub both sides of the mesh gently. Rinse with clean water and allow the screen to dry completely before reinstalling. Do not use a pressure washer on insect screens the force distorts and tears the fine mesh.

If screens cannot be removed, brush the mesh with a dry brush, then wipe it with a damp cloth, and allow it to air-dry before closing the window.

How to Clean Windows Without Streaks

Streaks are caused by cleaning solution drying on the glass before it is removed, by dirty cloths redistributing residue, or by soap residue left behind after wiping.

The most reliable streak-prevention methods are:

1. Use the right solution concentration. Using too much soap creates a film that is difficult to remove completely. A few drops of dish soap per litre of water or a standard glass cleaner diluted to the manufacturer specification is sufficient.

2. Squeegee in straight, controlled passes. An irregular or circular wiping motion leaves solution on the glass. A squeegee moved in straight horizontal or vertical passes to remove the solution in one clean layer.

3. Wipe the squeegee blade after every pass. A saturated blade redistributes solution back onto clean glass. Use a lint-free cloth to wipe the blade clean between every stroke.

4. Dry edges immediately. Water that pools at the frame edge runs back onto the glass and dries into marks. A dry cloth applied to all four edges after squeegeeing prevents this.

5. Work in diffused light or shade. Direct sunlight evaporates the solution before it can be removed—clean early in the morning, late afternoon, or on overcast days.

6. Use clean cloths. A cloth that has already absorbed dirty water redistributes soil. Use fresh cloths for the final drying and buffing stage.

7. Remove the cleaning product fully. Spray cleaners that are not wiped fully from the glass leave a residue film when dry. Buff with a dry cloth until the glass feels clean and smooth to the touch.

How to Remove Hard Water Stains, Grease, Paint Specks, and Other Stubborn Marks

Standard cleaning solutions remove general grime but are ineffective against hardened mineral deposits, set-in grease, dried paint, and adhesive residue. Each type of stubborn mark requires a different removal approach.

Hard Water Stains

Hard water stains are mineral deposits, primarily calcium and magnesium carbonates, left by evaporated tap water or sprinkler water. They appear as white, cloudy patches or ring-shaped marks on the glass.

Removal method: Apply undiluted white vinegar or a commercial calcium, lime, and rust remover directly to the affected area. Allow it to sit for five to ten minutes. Scrub gently with a non-scratch scrubbing pad. Rinse thoroughly and squeegee dry. For severe long-term deposits, a second application may be needed. A fine-grade steel wool pad (grade 0000) can be used on plain glass, never on coated or tinted glass, to polish out remaining deposits.

Grease and Oily Residue

Greasy marks on glass come from cooking fumes, fingerprints, or airborne oils. Isopropyl alcohol diluted with water (one part alcohol to two parts water) dissolves grease effectively without leaving residue.

Removal method: Apply the alcohol solution to the greasy area with a clean cloth. Wipe in a single direction to avoid spreading the grease. Buff dry with a fresh cloth.

Dried Paint Specks

Small dried paint specks are common on windows after building work or renovation. Do not attempt to remove dried paint with abrasive tools or hard scrapers.

Removal method: Soak the area with warm, soapy water for several minutes to soften the paint. Use a single-edge razor blade scraper at a very low angle (approximately 15 to 20 degrees) on wet glass to gently slide the paint speck off the surface. Keep the glass wet at all times while using the blade. This method is safe on plain float glass but should not be used on coated, tinted, or filmed glass surfaces.

Adhesive and Sticker Residue

Sticker adhesive or tape residue on glass can be removed with a small amount of acetone (nail polish remover) or a commercial adhesive remover on a clean cloth. Apply directly to the residue, allow a few seconds to work, and wipe clean. Follow with a standard glass clean to remove any solvent residue.

Best Window Cleaning Solutions for Home and Commercial Use

The best window cleaning solution depends on the type and degree of soiling, the type of glass, and the cleaning frequency. No single product works optimally for every situation.

Diluted Dish Soap

A small amount of mild dish soap — two to three drops per litre of warm water — is the most cost-effective and widely used solution for standard residential window cleaning. It cuts through light grease and dust without leaving a heavy residue when used at the correct concentration.

Best for: Regular residential cleaning, interior glass, lightly soiled windows.

White Vinegar Solution

A 1:1 mix of white vinegar and water is a widely used natural alternative that removes light mineral deposits and grease, and leaves glass with a clean finish.

Best for: Condensation stains, light mineral deposits, and eco-conscious cleaning.

Note: Vinegar is mildly acidic. Do not use it on natural stone sills, metal frames prone to corrosion, or window seals that show signs of wear.

Commercial Glass Cleaner

Ready-to-use spray cleaners (such as Windex, Glass Plus, or equivalent professional products) are formulated for quick application and effective residue removal on standard glass. Some contain streak-inhibiting surfactants.

Best for: Quick cleans, interior glass, spot cleaning.

Professional Window Cleaning Solution

Professional-grade concentrates are designed for high-volume use with water-fed pole systems or bucket-and-squeegee work. They typically have a low-suds formula to allow fast rinsing and minimal residue.

Best for: Commercial window cleaning, large surface areas, and frequent scheduled cleans.

Pure Water (Deionised or Reverse Osmosis)

Pure water, from which dissolved minerals have been removed, is increasingly used in professional window cleaning with water-fed pole systems. Because pure water contains no dissolved solids, it leaves no mineral residue when it dries, allowing windows to dry naturally without final drying or polishing.

Best for: Water-fed pole cleaning, exterior commercial glass, high-rise window cleaning.

How to Clean High or Hard-to-Reach Windows Safely

High or hard-to-reach windows pose a real safety risk. Falls from height are a leading cause of serious injury during domestic maintenance tasks. Before attempting to clean high windows, assess the height, access method, and your ability to work safely at that position.

Ground-Level Extension Poles

For windows up to approximately three to four metres from the ground, a telescoping extension pole fitted with a window scrubber and a squeegee attachment allows cleaning from ground level without a ladder. This is the safest option for single-storey upper windows and lower second-storey windows.

Extension poles are widely available from hardware and cleaning supply stores. When using an extension pole:

• Stand at a stable base with feet shoulder-width apart
• Do not overreach; reposition yourself to maintain balance
• Use a squeegee attachment rather than a cloth for better solution removal at height

Ladder Use

Ladder use for window cleaning at height carries a significant risk. If a ladder is necessary, follow safe ladder positioning guidelines:

• Use a stable, undamaged ladder rated for the required height
• Position the ladder at a 75-degree angle (one unit out for every four units up)
• Secure the ladder at the top and base, or have another person hold the base
• Do not carry heavy buckets while climbing — use a hook or strap to secure the bucket to the ladder
• Maintain three points of contact at all times
• Never reach beyond your waist to either side while on a ladder
• Do not use a ladder on unstable or uneven ground without levelling equipment

Relevant guidance on safe ladder use for home maintenance tasks can be found through occupational health and safety authorities. WorkSafe Victoria's ladder safety guidance provides a reliable reference point.

Water-Fed Pole Systems

Water-fed pole systems extend the reach of professional cleaners to approximately fifteen metres from the ground or more, depending on pole configuration. These systems pump purified water through the hollow pole to a brush head that scrubs the glass. The window is then rinsed with the same purified water and allowed to air-dry, leaving no mineral residue.

Water-fed pole systems eliminate the need for ladders on most low- to mid-rise buildings and are now the industry standard for exterior window cleaning on residential and commercial properties up to approximately four storeys.

High-Rise and Above-Reach Windows

For windows on the upper floors of multi-storey residential or commercial buildings, access methods include:

• Cradle/gondola systems — motorised suspended platforms used by trained operators on tall buildings
• Abseiling/rope access — used by trained specialists for locations where cradle systems cannot reach
• Boom lifts and scissor lifts — used for mid-rise work on properties with suitable ground clearance

These methods require trained personnel, appropriate equipment, and in many cases, formal working-at-height certification and safety plans. These are not DIY tasks. For buildings above two storeys, professional commercial window cleaning is the appropriate and safe choice.

Residential vs Commercial Window Cleaning: What Changes?

Residential and commercial window cleaning share the same core principles: clean glass, streak-free finish, safe method, but differ significantly in scale, access method, frequency, surface type, and regulatory requirements.

Residential Window Cleaning

Residential cleaning typically involves standard float glass, aluminium or uPVC frames, and windows accessible from ground level or by standard ladder. The main variables are window count, soiling level, and whether the property has conservatories, skylights, or upper-storey windows requiring extended reach.

Most residential window cleaning involves:

• Bucket, squeegee, scrubber, and microfiber cloths
• Extension poles for upper windows
• Standard cleaning solutions
• Cleaning frequency of four to twelve times per year, depending on environment and preference

Commercial Window Cleaning

Commercial window cleaning involves larger glass surfaces, higher access requirements, greater safety obligations, and more complex surface types. Offices, retail premises, apartment blocks, industrial facilities, and public buildings each present specific cleaning challenges.

Key differences in commercial window cleaning:

For retail storefronts and hospitality venues, clean windows directly influence customer perception and foot traffic. Regularly scheduled cleaning contracts ensure consistent presentation and reduce the build-up of stubborn soiling that requires more intensive intervention later.

For multi-storey office or apartment buildings, professional window cleaning is not just a maintenance task; it is a safety-regulated activity that must be planned, documented, and performed by qualified operators.

When to Hire a Professional Window Cleaner

Professional window cleaning is worth considering when the windows are difficult to access safely, when the glass requires specialist treatment, or when cleaning frequency and volume make professional service more practical than DIY.

Hire a professional when:

• Windows are above ground level and cannot be safely reached with a standard ladder or extension pole
• The property is a multi-storey building, high-rise apartment, or commercial premises that require specialised access equipment.
• Windows have severe water stains, oxidation, or post-construction contamination that requires specialist chemical treatment.
• The glass is coated, tinted, filmed, or treated. Incorrect products or methods can permanently damage these surfaces.
• You have mobility limitations, lack the right equipment, or are not confident working safely at height.
• The property has a large number of windows that would take significant time to clean properly.
• Commercial or strata properties require documented, insured, and compliant cleaning services. 

Professional cleaners bring the right equipment, tested solutions, safety protocols, and experience with different glass types. They also carry public liability insurance, an important consideration for any commercial or multi-tenancy setting.

For end-of-lease cleaning, where window cleanliness is part of the property condition assessment, professional cleaning provides a clear standard and a documented result. 

When evaluating professional window cleaning services, look for:

• Public liability insurance coverage
• Experience with your property type
• Clear pricing and scope of service
• References or verifiable reviews

How Often Windows Should Be Cleaned

How often windows need cleaning depends on the local environment, the building type, the window exposure, and the purpose of the building.

General Frequency Guidelines

Factors That Increase Cleaning Frequency

• Coastal locations — sea salt spray deposits build up rapidly on glass surfaces and cause corrosion of seals and frames if left untreated
• Near roads or construction — traffic dust, exhaust residue, and construction particles accumulate quickly on exterior glass.
• Industrial proximity — airborne particulates and chemical deposits require more frequent cleaning and sometimes specialist solutions.
• In high-foot-traffic areas, fingerprints, body oils, and condensation from body heat accumulate rapidly on commercial entrance glass.
• Trees and gardens nearby — pollen, sap, and organic deposits from nearby vegetation require regular removal before they bond to the glass.

Windows that are cleaned regularly are easier and faster to clean each time. Infrequent cleaning allows deposits to harden and bond to the glass, making them harder to remove and requiring more time and stronger treatment to restore the glass to a clean state.

Common Window Cleaning Mistakes to Avoid

Most window cleaning problems — streaks, smears, scratches, and residue — come from avoidable errors in product choice, method, or timing.

1. Cleaning in Direct Sunlight

Sunlight heats the glass and evaporates the cleaning solution before it can be removed, leaving a film of residue behind. Clean in shade, early morning, or late afternoon.

2. Using Too Much Soap

Excess dish soap or glass cleaner creates a thick suds layer that is difficult to remove fully. Use a minimal amount of soap, two to three drops per litre of water and increase concentration only for heavy soiling.

3. Using a Dirty Cloth

A cloth that has already absorbed dirt or cleaning solution redistributes it across the glass. Use clean, freshly laundered microfiber cloths and replace them when they become saturated or discoloured.

4. Wiping in Circular Motions

Circular wiping paths move the solution around the glass rather than removing it. Straight, parallel strokes from top to bottom consistently move the solution off the glass surface.

5. Neglecting the Edges

Solution that sits in the corners or along the frame dries into marks. Always dry the full edge perimeter after squeegeeing or wiping.

6. Cleaning Glass Before Frames and Tracks

Cleaning the glass first, then brushing dirt from the frames and tracks, deposits dust back onto the clean glass. Always clean frames, tracks, and sills before the final glass wash.

7. Using Abrasive Tools

Steel wool (except the finest grade 0000 on plain glass), kitchen scourers, abrasive cream cleaners, and hard scrapers scratch glass permanently. Never use abrasive tools on window glass except where specifically designed for glass use.

8. Ignoring Safety for High Windows

Attempting to clean upper-storey windows from an unstable ladder, without securing the ladder base, or by overreaching, is a leading cause of falls from height in domestic settings. Use extension poles or engage a professional for windows that cannot be safely reached from the ground.

9. Using the Same Water for Multiple Windows

The solution in the bucket becomes contaminated after several uses. Change the water and solution after every four to six windows, or sooner if the water becomes visibly dirty.

10. Leaving Wet Screens in Closed Windows

Reinstalling damp screens and closing the window traps moisture against the glass and frame, encouraging mould growth and leaving watermarks when the moisture eventually evaporates. Allow screens to dry fully before reinstalling.

CONCLUSION

Cleaning windows properly comes down to three things: using the right tools, applying and removing the solution before it dries, and drying every edge completely. A squeegee, a clean microfiber cloth, and a well-diluted cleaning solution handle the vast majority of window cleaning tasks in homes and most commercial settings. Work from top to bottom. Avoid cleaning in direct sunlight, and clean frames, tracks, and sills in the correct order to prevent recontamination of clean glass.

For stubborn, hard-water stains, the right acid-based remover, applied patiently, removes what standard products cannot. For greasy glass, a small amount of alcohol or a stronger surfactant solution can cut through what soap and water alone will not remove.

Cleaning high windows safely matters as much as cleaning them well. Extension poles eliminate the need for a ladder in most situations. Where height or access genuinely requires it, a trained professional with the right equipment is always the safer and more practical choice.

Not every window cleaning job is a DIY job, and knowing when to call a professional is part of doing the job right.

For advice or to hire a professional, contact Westlink Cleaning Services.

FAQs About Cleaning Windows

1. What is the best homemade solution to clean windows?

The best homemade window cleaning solution is one part white vinegar to one part water, applied with a clean microfiber cloth or window scrubber, then removed with a squeegee. For greasy glass, replace the vinegar with a few drops of mild dish soap in warm water. Both solutions are effective for standard residential glass when applied and removed properly.

2. Does vinegar really clean windows without streaks?

Yes, a 1:1 white vinegar and water solution cleans windows without streaks when applied correctly. The acetic acid in vinegar dissolves mineral deposits and light grease, and the solution dries without leaving significant residue if removed with a squeegee or clean microfiber cloth before it evaporates. Streaks from vinegar solutions are usually caused by applying too much solution, cleaning in sunlight, or using a dirty cloth.

3. Is a newspaper still good for cleaning windows?

Newspaper was a commonly used window cleaning tool historically, but it is no longer recommended. Modern newspaper inks can smear on glass and stain window frames. The paper also disintegrates quickly when wet, leaving fibres on the glass. A clean microfiber cloth is more effective, leaves no residue, and can be washed and reused.

4. Why do my windows always streak after cleaning?

Window streaks after cleaning are most commonly caused by: cleaning in direct sunlight (solution dries before removal), using too much soap (residue remains after wiping), using a dirty cloth (redistributes soil), or not drying the edges (water runs back from the frame). Using a clean squeegee with a fresh blade and wiping it dry after each pass is the most reliable way to eliminate streaking.

5. How do you clean windows that are too high to reach?

Windows that are too high to reach safely by hand can be cleaned with a telescoping extension pole fitted with a window scrubber and squeegee attachment. This allows cleaning from ground level for windows up to approximately three to four metres high. For windows above this height, a water-fed pole system or professional window cleaner with appropriate access equipment is the safer choice. Do not use an unstable or makeshift platform to reach high windows.

6. How do you remove hard water stains from windows?

Hard water stains are removed by applying undiluted white vinegar or a commercial calcium, lime, and rust remover to the affected area, allowing it to soak for five to ten minutes, then scrubbing gently with a non-scratch pad and rinsing thoroughly. For severe deposits, a second application may be needed. On plain float glass (not coated or tinted), a 0000-grade fine steel wool pad can be used with a cleaning solution to polish out remaining residue.

7. Can you pressure wash windows?

Pressure washing is generally not recommended for window glass. High-pressure water can crack or break single-glazed glass, force water into double-glazed unit seals, causing permanent fogging, and damage window frames, seals, and weatherstripping. A low-pressure garden hose rinse is safe as a pre-wash step to remove loose dirt from exterior windows before the main clean. Pressure washing window surrounds and external walls should be done with care to avoid directing force at the glass and frame seals.

8. How do you clean double-glazed windows that are cloudy inside?

Cloudy internal fogging in a double-glazed window unit indicates that the sealed air gap between the panes has been compromised, allowing moisture to enter the unit. This cannot be cleaned from the outside — it is a seal failure that requires the glazed unit to be replaced. Attempting to clean the internal surfaces of a sealed double-glazed unit through drilling or breaking the seal permanently destroys the unit's thermal and acoustic performance.

9. How do you clean tinted or coated windows?

Tinted or coated windows require a gentle, pH-neutral cleaning solution with no abrasive additives, strong ammonia, or bleach. Use a soft microfiber cloth — never an abrasive pad or razor blade. Apply a small amount of mild glass cleaner or diluted dish soap, wipe gently, and buff dry with a separate clean cloth. Check the manufacturer's guidance for the specific coating or film product, as some coatings have specific cleaning restrictions. When in doubt, contact the glass manufacturer or installer.

10. How often should residential windows be cleaned?

Most residential windows benefit from cleaning every three to four months (quarterly). Windows in coastal areas, near busy roads, or in dusty environments may need cleaning every four to eight weeks. Interior windows in homes with pets, young children, or high condensation levels also benefit from more frequent cleaning. Annual cleaning is the minimum requirement to maintain their appearance and prevent long-term buildup of mineral deposits and oxidation.