No matter if your TV has been caressed by the sticky fingers of your child or your own personal computer is dull you can safely clean these  screens by boiling and cooling 1/2 cup of water (boiling removes minerals that may leave a film on the screen). Then mix with 1/2 cup of isopropyl alcohol. Pour into a clean spray bottle. Spritz onto a microfiber cleaning cloth (NEVER directly on the screen) and wipe away. Store this solution in an airtight container for up to a month. DO NOT use this cleaner on any touch screens as it may weaken the protective coating.