There are a few simple rules to follow when cleaning you TV or computer monitor's screen. Never use force, you can destroy an LCD monitor by pushing to hard. Never pour or spray liquid cleaning agents on your monitor or TV. Never leave your monitor damp, always thoroughly dry and remove all cleaning agents. To clean your screens, first wipe with a microfiber cloth. This will remove most dust and light smudges. For tougher spot, dampen a cloth with vinegar and wipe the mark in a circular motion. Commercial products, like TV wipes, work very good but are a little expensive.