Bubbling, peeling or purple tint won't get better, and it can make driving at night harder. Removing it takes a few hours per car. The goal is to get the film and all of its adhesive off without scratching the glass or breaking the defroster lines on the rear window.
Method 1: Heat and peel (best for most windows)
You'll need: a heat gun or a hair dryer on high, a plastic razor blade, a spray bottle of soapy water, and adhesive remover.
- Heat a corner of the film for 30 to 60 seconds, holding the heat gun a few inches from the glass and keeping it moving.
- Lift the corner with a fingernail or plastic blade and peel slowly at a low angle, heating just ahead of the peel. Slow and warm keeps the adhesive attached to the film.
- If the film tears into pieces, heat the next section and start a new corner.
- Spray any adhesive left on the glass, let it soak, and scrape it off with the plastic blade or wipe it with adhesive remover.
- Finish with glass cleaner.
Method 2: Steamer (fastest)
A fabric or wallpaper steamer works the same way as a heat gun but also softens the adhesive with moisture. Steam the outside and inside of the glass, then peel. Many professionals use this method because it leaves less adhesive behind.
Method 3: Sun and trash bag (no tools)
- On a hot, sunny day, cut a black trash bag to the shape of the window.
- Spray the outside of the glass with soapy water and stick the bag to it.
- Protect the interior with towels, spray the inside film with a 1:10 ammonia and water mix, and cover it with a second piece of bag.
- Leave the car in the sun for an hour, then peel the film. Ventilate well and wear gloves: ammonia fumes are harsh.
Protect the rear defroster lines
- Never use a metal razor blade on the inside of a rear window. It will cut the heating lines.
- Peel parallel to the lines, not across them.
- Use steam or heat, not scraping, to remove adhesive from over the lines.
Home windows
The same heat-and-peel method works on house windows. Metal razor blades are fine on plain glass, but not on coated low-E glass or tempered glass with a factory coating: check the glass type first.
What next
Once the glass is clean, it's ready for new film. See how to install car tint or shop car window tint and home and office film.
Photo: Suyash Dwivedi, CC BY-SA 4.0, via Wikimedia Commons, cropped.
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