DON'T use glass cleaner!!  You can buy chemicals just for monitors and LCDs
at most computer stores.  A lighly damp cloth (water) will also do the trick
if you do it often.

Windex and similar wear off a film that covers the screen over time and will
pretty much destroy your display.

Rick B

A colleague of mine gave me a miniature stuffed animal (a dog) as a present.
I've been using it to wipe my screen once in a while.

http://www.clean-your-screen-for-free-now.com/

if you've got a fast connection...

                 John W. Vinson[MVP]    

At work, we use "Free of Charge" mfg by rubachem
http://www.rubachem.com/site/index.html. Since they are free of charge, I
sometimes bring a couple home from work to use on my personal laptop ;-)