Never touch a plastic windshield with a paper product. Use terry cloth, tee shirt material, flannel of one of those micro fibre cloths. NEVER wipe in a circular motion on the outside of a windshield or screen. ALWAYS wipe in the direction of air flow. (anyone who has landed an airplane into the sun on a clear day at 5 pm can tell you why) The absolute best product I have ever used is Sumner Laboratories 210 plastic cleaner. It beats Plexus and the ole standby Meguires number 10. Just my 2 cents.