I decided to get my windows retinted. Being the cheap--er frugal--person I am, I took the old tint off myself. I sprayed a solution of water and ammonia on the back galss and covered it with a trash bag. I few hours did not loosen the glue but the film came off easy. I used a magic eraser and within an hour all of the glue was gone. The rear window, 2 door windows and the 2 quarter windows. I still wasn't done, I had to sand down the dot matrix around the rear window too. Magic Eraser rocks!!