All window film deteriorates with age and eventually has to be detached. Two of the most common symptoms of dying film are the dread "purple film" and the "bubbling film". Purple film is cause by non-metallic dyes in the film breaking down and changing color. Bubbling film is a sign that the glue used to apply the tint to the window is failing. After a single bubble appears, many more will go after. It is now time to think how to take away window tint –
Step 1: To over come separation between layers you must soften the glue so that both layers peel at the same time. This is very significant, if you peel the just the top layer, you may as well just use razor blades as present is no way to peel the second layer off without option at it for a few hours. You must try to peel both layer at once.
NOTE: You are more than likely to injure one or more of your defroster lines, when this happens, the cut line will not work any longer. Some cars have radio antennas mounted alongside the defrosters made of the similar material. If you injure these, your radio antenna will not work! Be careful! Taking it to a tint shop to be done very much increases the odds of economy the lines, but even a tint shop can not assure to save your lines, from time to time the film is just to far gone.
Step 2: First, clear the window of any obstruction, like the brake light, speaker covers etc.
Step 3: Next cut open the trash bag so that it will be big enough to cover the entire window. Spray some water on the exterior of the back window and the lay plastic bag over the glass. Cut away excess plastic so that it is now approximately the same shape as the glass.
Step 4: Next, lay a tarp in excess of rear deck and seat, spray ammonia copiously on the inside of the back window. (Ammonia is very strong, I suggest you hold your breath during this step) and cover ammonia covered with water tint with the plastic bag so that it won't evaporate.
Step 5: Park the car with rear window opposite the sun for about an hour. The film should now be prepared to peel.
Step 6: When you are ready to create peeling, leave the plastic in place so the ammonia wont dry. Get the peeling in progress with a razor blade in a corner where there are no defroster lines. Try to peel film off in one part. If the ammonia dries as you peel, the glue will get hard again, so scatter a bit of ammonia on the region as you peel.
Step 7: Once the film is peeled you will need to rub the adhesive off with ammonia and fine steel wool. Mop up scrub areas with paper towels before they dry. Come to an end up with window cleaner and paper towels.
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