So I got a scratch on my iPhone 4 screen.. Ik I should have a screen protector but it's a long story... But anyway... It's VERY thin and u can't see it unless u look for it.. But it drives me nuts still.... Would toothpaste help? I heard from some that it makes it worse and from others that it works great... If I try it on my iPod 2g, will I get similar results on my iPhone? (are the screens the same?)