T.P.
I wouldn't use anything with amonia in it, it can cloud the screen, I went to Best Buy and got LCD cleaning wipes, they work great. My daughter went through this thing when we got ours where she kept kissing the screen leaving lip prints (often with food on her mouth) and a crayon once. I have also used Method's All Purpose non-toxic Cleaner on it and it was fine too. (I get my Method products at Target) Good Luck!