I use Pixelclean for all LCD screens, cell phones, GPS unit and will use it for my Kindle 3 as well ONLY if needed.
Here's where to get it:
http://www.pixelclean.com/product/Pi...Set-of-12.html
Peferably, just use the dry cloth if possible. If using the wet cloth, just touch it to the screen and use the dry cloth to spread it.