in the sink i just put a tiny dab of hand soap, fill with some water, and dip a corner of a soft cloth in it. the little bit of soap is just to break up an fingerprints and oils that are on there. i seriously doubt it causes any damage to the screen. mine still looks fine.
the warnings that you see are to keep people from using window cleaner or anything ammonia-based, as that will damage the plastic.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS