Google never fails me. I found a lot of message boards and blogs with info, but we all know they're unreliable.
So I decided to check with the experts at C-Net! They never let me down:
From their "Ask the Editors" section:
Q: I'm wondering, what's the best way to clean an LCD? I contacted the manufacturer, who suggested using a damp cloth, but now my screen is covered with streaks. Is there anything that can clean it and remove the streaks? Is Windex a valid option, or will it harm the delicate screen?
A: Never use a cleaning agent such as Windex on your LCD. Those cleaners often contain ammonia, which can, over time, damage your display's panel. A slightly damp, lint-free cloth, like the ones included with eyeglasses, or a microfiber cloth should do the trick. Never use paper towels! If you see streaks, follow the damp cloth immediately with a dry one. You can moisten the cloth with plain water or a commercial LCD panel cleaner, available at office supply stores. These commercial cleaners are often just 50/50 isopropyl alcohol and water mixtures, so clearly, you can mix that yourself and save a couple of bucks. Just remember never to spray any liquid directly at your screen. Moisten the cloth instead.