Most experts suggest you can use a 50/50 cleaning  solution of distilled water and isopropyl alcohol. You  should use a soft cloth such as an old cotton T-shirt or  handkerchief. Don't use tap-water, tissues, paper  towels or ordinary dish cloths.

 Shut down any devices before cleaning. Dampen your  large cleaning cloth with your solution and apply very  gentle pressure, cleaning the display in a circular  motion. Let dry before turning your device back on.

 Word of Caution  - you should always check your owner's manual  for the recommended cleaning method for your LCD TV or Laptop  Screen.