I was told years ago to use a Very light soapy water mixture, i mean maybe 2 or 3 drops of dawn with like 10cups of water, soft cloth is a must. Waxing like BCB said is a MUST, use a high quality Carnuba wax,Meguiars or Mothers can be bought easily. Usually if its not too hard of water spots on the screen good ole water works great, but ive always had luck with the Dawn, its a old window tint trick, same concept. Your Signature …