Hey guys. Well, the other day, I got the iPod touch screen really diry becuase I hadnt washed my hands before using it. So I went to the shops to buy a glass cleaner (As far as I know, there was no ammonia in the glass cleaner, but it did contain vinegar). I cleaned my screen with it and it looked good as new. But the screen was very slippy, as if there was water on it, but when I took my finger off my finger was dry. So I left it for a day to see if it would get better, but it is still really slippy. Any idea why? Thanks.