Get iKlear! Its Apple recommended and is seriously the best product i have ever seen to clean the screen. It also gives it 2 protective layers to help it from getting permanently damaged. OWC is a good place to get it, low prices, cheap shipping ($6). I would suggest getting the starter pack. It comes with the cleaning wipes and the protective anti-static spay with dust-free cloths. This has saved my LCD on my Powerbook many times when i have splashed stuff on it... it just comes right off.