I can say, that I have permanent nose prints on my tint. Stuff won't come off the film. I will also point out that my tint is 20 years old, put on when the rig was first purchased, and severely needs to be re-done. The newer tints are much better quality, more sophisticated, and may very well clean up better. You will want to ask the installer about this, as they will know better than I. And as long as I am pointing things out, I will say that I HATE cleaning windows. I don't know why, I just do. Therefore, I only clean my glass on a "need be" basis, and, since I can't see out of the bottom part of the back windows anyway (that's as high as my Am-Staff reaches), I don't fell that I "need" to clean them that often...or ever. If one were to clean the nose prints off regularly, before they got baked by the sun, they may clean off without much difficulty.