Kensington makes a pretty decent lcd spray cleaner that I ganked from work. I spray it lightly on my TiBooks screen and work it quickly without a lot of pressure on the screen. It clears up the dust and the oils that get deposited from the keyboard when it's closed... y'know those marks that you think are indentations...
Comments
I'd go that route...
I believe Apple recommends http://www.themacshoppe.biz/iklear.html and I have it, works fine, comes with cloths too.