When Car Window Tints fail, particularly on the rear screen, it can appear bubbled or distorted. This generally happens due to window tint film adhesive failure. It is more common that this will happen with cheaper, dyed Window Tint, but it can happen to better quality films as well. The angle that the rear screen of a vehicle sits at means that the window is exposed to more direct sunlight than the side windows, and the spectrum of lighting that hits the window will eventually break-down the components that the Window Tint is made of, in particular, the adhesive.
Adhesive failure can happen to a quality Window Tint after about 10-15 years, and can occur in as little as 12 months with cheaper, dyed Window Tints.
The process of removing Window Tint to minimise any risk involved with keeping the integrity of the demister bars intact and any radio antennas imbedded in the glass takes care and time.