I am currently using a Steinheil screen protector on my ipad 2 and yesterday it got some scratch marks on it when I was playing a game with my Flick joystick. At first I thought my screen got scratched, but it turned out to be the screen protector that got scratched. Now I'm looking for a new screen protector that is completely scratch proof and I always see people recommend zagg brand. Are they scratch proof? If not, is there one that is?