Whatever you use, try a small amount in the corner of the screen first. If it messes up the screen it won't be a huge swipe across the screen, it'll just be a small bit in the corner. Some screens have a coating over them, some are just sensitive to chemicals. Clean with caution. I use a soft towel with a touch of water to clean mine.
RocketMan Tex, I disagree... I think he should use a POWER WASHER. What do YOU say? Does it matter if it is one of them shiny screens or one of them TFT screens? I think your sweater's sleeve should be cool... no?
Windex has ammonia, so that might degrade the screen. I just buy iKlear with a microfiber cloth. Works great and is safe.
You've gotta be kidding. Are you for real? This must be a joke. Everyone knows you use LARD instead of Vegiie table oil, you silly willy! DUH.