I have read not to clean plastic windshields with Windex since it contains ammonia, or ammonia, they are suposed to cloud the windshield with time and repeated use. I understand windex now has a cleaner for plastic. I have heard Rain-X will do the same. Although I never had this problem with rain-X.
I see some only clean the windsield with water and a micro cloth. I have used Lemon Pledge with good success. Lately I use Yamaha's spray cleaner polish & detailer. The small amount of wax prevents scratching and beads water. You can carry a can of cleaner in your bags and clean bugs off, on the road with no problem.
Scratching or discoloring are the problems.
Key to not scratching are don't rub the dust around and don't use a cloth that is tougher than the windshield. Like Polyester or Nylon. 100% cotton or the micro cloth. Used cotton a long time before the micro cloth came around. Rube lightly and only after the dust is off.
Last edited by linerdave; 05-08-2010 at 03:52 PM.