I mainly use alcohol and a clean cotton t-shirt. Also, I've used windex with success on my flat panel LCD's. As mentioned below, you should not use Windex on a laptop or any LCD panel that has anti-glare material. I used to work on Gateway laptops that had this type of material. For them, the best thing to use is water. I do prefer alcohol and/or windex as they seem to clean my screen better than plain ole' water, but they don't have any anti-glare material on them, either.