Old tint that has turned purple, privacy film that is bubbling at the edges, or frosted film a previous owner left behind: sooner or later many Singapore homeowners need to know how to remove window film. This guide explains how to remove window film with gentle heat or soapy water, how to clear the sticky residue it leaves, and the safety rules that apply when anyone, including your helper, works on windows in a high-rise home.

Window film cuts glare and afternoon heat, and adds privacy in HDB blocks that face each other. But years of strong sunlight and humidity break down the film and its adhesive, leaving peeling corners, cloudy patches and bubbles.

Most interior films come off with patience and household tools. Rushing the job usually leaves stubborn glue, or worse, a scratched or cracked pane.

Before you start: check the film and the glass

Which side is the film on?

Most residential film is applied to the inside of the glass. Run a fingernail gently along the edge of the pane from inside. If you can feel a lip or see a cut edge, the film is on your side. If the inside surface feels like plain glass, the film may be on the exterior, and that changes the safety picture considerably, which we cover below.

What kind of glass is it?

Plain single glazed windows are the most forgiving. Take more care with:

Double glazed units, where too much heat or a sharp blade near the edge can damage the seal between the panes.
Coated glass, such as glass with a reflective or low emissivity coating, which a metal blade can scratch.
Tempered or toughened glass, common in shower screens and some full height windows, which can scratch more easily than people expect if a blade picks up grit.
Windows still under warranty. If the windows or the film were installed recently, check the terms with the installer before you start.

Do you need permission?

If you rent, the film may belong to the landlord, so ask first. In a condominium, check with the management office if the film is on facade windows, as some developments have rules about the external appearance of units.

What you will need

A hairdryer, or a handheld steamer, for gentle heat
A spray bottle filled with warm water and a few drops of dishwashing liquid
A plastic scraper, plus a single edge razor blade scraper with fresh blades for plain glass only
Microfibre cloths and old towels to catch drips
Rubbing alcohol for stubborn residue
A bin bag for the old film
Gloves and, if you are scraping overhead, eye protection

Lay towels along the sill and floor first, as soapy water runs down and makes tiles slippery.

Method 1: how to remove window film with heat

Gentle heat softens the adhesive so the film peels away in larger pieces, with less glue left on the glass. This is the method we suggest trying first on most interior films.

Heat a corner. Hold the hairdryer on a warm setting about 5 to 10 centimetres from one corner of the film and move it slowly for 30 seconds or so. Keep the dryer moving rather than holding it on one spot.
Lift the edge. Use a fingernail or the plastic scraper to lift the corner. If it will not lift, warm it a little longer.
Peel slowly at a low angle. Pull the film back on itself, close to the glass, rather than straight outwards. Heat the area just ahead of where you are peeling as you go.
Work in sections. If the film tears, start again from a new corner rather than picking at small pieces.
Bag the old film as you go, since it is sticky and will cling to anything it touches.

Do not overdo the heat. Glass can crack when one area becomes much hotter than the rest, or when warm glass is suddenly cooled. The same applies to a steamer: keep it moving, and do not aim heat at glass that has just been chilled by air conditioning. Never spray cold water onto glass you have just heated, and avoid using a heat gun meant for paint stripping, which runs far hotter than a hairdryer and is easy to misjudge.

Method 2: soapy water and a scraper

If the film is brittle and flakes, or you prefer not to use heat, soaking is slower but very gentle.

Score only if needed. If the film’s top layer is intact and waterproof, very lightly score it with the plastic scraper so water can reach the adhesive. Do not press hard into the glass.
Spray generously with the warm soapy water until the film is fully wet.
Cover and wait. Press a sheet of cling film or a black bin bag over the wet film. It keeps the surface wet and, on a sunny window, the trapped warmth helps loosen the glue. Leave it for about an hour, keeping it damp.
Peel and scrape. Remove the cover and peel from a corner. Use the plastic scraper on stubborn patches, keeping the glass wet throughout.
Use a razor blade only on plain glass. Hold it at a low angle, around 30 degrees or less, push it forward in one direction only and keep the glass wet. Never drag it backwards, which can scratch the pane, and stop at once if you hear grinding, which usually means grit is under the blade.

How to remove adhesive from glass

Even a clean peel often leaves a hazy layer of glue, and here gentle persistence beats force. Our guide on removing sticker residue covers similar methods for tiles and walls, but on glass the steps are:

Soften the residue by spraying it with warm soapy water and leaving it for a few minutes.
Scrape it off with the plastic scraper, or a wet razor blade on plain glass, wiping the blade clean often.
Treat what remains with rubbing alcohol on a cloth. Test it first on a small corner, especially near painted or rubber window frames, which it can damage. Open the window or switch on a fan while you work, keep it away from any naked flame, and keep children out of the room.
Finish with a normal glass clean. Wash with soapy water, rinse, then wipe dry with a clean microfibre cloth to avoid streaks. For a streak free finish, our guide on how to clean windows has more detail.

Two warnings. Never combine products: mixing cleaners, especially bleach with ammonia-based or acidic products, can release toxic fumes. And avoid abrasive powders or scouring pads, which can leave fine scratches that show up in every sunset.

Safety: heat, blades and electricity

This light-looking job combines blades, heat, water and electrical appliances.

Keep the hairdryer’s cord and plug away from the soapy water and dry your hands before handling it. Unplug it when you switch to wet methods.
Keep razor blades covered between uses and out of children’s reach.
Wear gloves when scraping. Old film can split into sharp edged flakes.
Use a stable step platform for tall windows rather than a chair, and do not stretch beyond it.
Keep the window closed and latched while you work on the inside of the glass, and never lean out, sit on the sill or stand on a ledge.
Stop if you see a crack spreading or hear the glass creak. Replacing glass is a job for a contractor.

Window safety in HDB flats and high-rise homes

Your helper and the exterior of windows

Under the Ministry of Manpower’s rules, employers must not let their migrant domestic worker clean the exterior of a window unless the window has a grille that stays locked throughout and an adult supervises. Windows at ground level or along common corridors are exempt. As MOM restated in a 2025 written answer in Parliament on MDW fall safety, breaches can lead to a fine of up to $10,000, imprisonment of up to 12 months, or both, and the employer may be barred from employing a helper. Employers also sign a safety agreement with their helper on window cleaning.

Scraping or peeling film from the outside of a high-rise window involves the same reach and the same risk as cleaning it, so treat it the same way. In practice, our advice is simple: removing film on the inside of the glass is fine for your helper if she is comfortable doing it, while film on the exterior of a high-rise window should be left to a specialist. You can read more about the main rules in our article on MOM regulations for domestic helpers.

Check the windows themselves

Peeling film is often the first time anyone has looked closely at a window in years. The Building and Construction Authority advises that homeowners check and maintain their windows at least once every six months. For casement windows, aluminium rivets should have been replaced with stainless steel ones; for sliding windows, the safety stoppers and angle strips should be in place. BCA also cautions against using excessive force to open or close sliding windows. While you are working, avoid pushing hard on the sash or leaning on an open casement window, and if anything is loose, rusty or missing, call a BCA-approved window contractor.

When to call a professional

Consider a specialist if the film is on the exterior of a high-rise window, if the glass is double glazed, coated or still under warranty, if the film is a thick security or safety film designed to hold shattered glass together, or if large panes need scaffolding or tall ladders to reach. A professional film installer can handle these.

If you are preparing a home for new tenants, we can help with the cleaning that follows. Our move-in and move-out cleaning covers whole homes, and we offer a tape stain removal add-on for leftover tape marks around the house.

Frequently Asked Questions

Can I remove window film without a heat gun?

Yes, a household hairdryer on a warm setting softens most interior film adhesive safely, and the soapy water soak method works without any heat at all, so a paint stripping heat gun is not needed and is easy to overheat glass with.

Will a razor blade scratch my window glass?

A fresh blade held at a low angle on wet, plain glass and pushed in one direction rarely scratches, but blades can mark coated, tinted or tempered glass, especially if grit gets underneath, so use a plastic scraper on those surfaces.

How long does it take to remove window film from one window?

A standard bedroom window usually takes an hour or two including residue removal, longer if old film breaks into small flakes.

Can my helper remove window film from the outside of the window?

Only if the window has a grille that is locked throughout and an adult is supervising, unless it is at ground level or along a common corridor, and for high-rise exterior film we recommend using a professional instead.

What is the safest way to remove adhesive from glass?

Soften the glue with warm soapy water, scrape it gently while the glass is wet, then treat any remaining haze with rubbing alcohol on a cloth in a ventilated room, without mixing it with other cleaning products.

Conclusion

Removing old window film is mostly a matter of patience. Check the type of film and glass first, soften the adhesive with gentle heat or soapy water, peel slowly at a low angle, and clear the residue with a wet scraper and a little rubbing alcohol. Keep blades, heat and electricity apart, and never let the job turn into someone leaning out of a high-rise window.

Once the film is off, check that the window itself is in good working order.

Once the film is gone, a proper clean makes the whole room feel brighter. Femme5 also offers home cleaning in Singapore by the hour and deep cleaning for kitchens and bathrooms. Message our team for a quote.

The Femme5 Team
Home cleaning team, Femme5 Agency
Femme5 provides part-time home cleaning, deep cleaning and post-renovation cleaning for HDB flats, condominiums and landed homes across Singapore.

Femme5 Cleaning Team

Written by the home cleaning team at Femme5 Agency Pte Ltd, which provides part-time home cleaning, deep cleaning and post-renovation cleaning across Singapore.

How to Remove Window Film and Clear the Glue Safely