I've cleaned my monitor with a bit of spit and toilet roll, probably a bad idea, but it seems OK so far.
Haha well, I'm lazy, so it's either bog roll or my sleeveFor the love of god don't clean your screens with toilet roll, not only will it scratch over time you will just be putting loads of dusty crap on it. Damp cloth, gently wiped the same way, then do the same with a dry cloth. Always make sure their clean too.