How to avoid creasing on the back glass of a 2020 Toyota Corolla.
Method 1: The most common reason for getting creases on the back glass of a 2020 Toyota Corolla is from doing an H pattern. Instead of using an H pattern, tack the film down with one horizontal line dividing the top from the bottom sections. When it comes to the top corners, don’t pull from the side of the film as much as you would on other cars. Instead, only pull from the sides once everything in the center is fully shrunk. You can also leave the film longer on the top and the bottom to allow for more shrinking. Also, make sure your heat gun is working sufficiently.