I discovered if you have a decent install and there's one or two issues, leave it alone. Trying to improve the SGP clear leaves you with more problems than you were trying to fix. Mine had a dust spot and now the whole screen looks like is has the mumps after working it over. You practically have to do it in a clean room environment and be real fast and antiseptic in getting it attached. Once you get finger oil or dust, you are hosed.