SL Plastic Window Cleaner

When I clean the plastic rear window of my SL, no matter how hard I try, I get that chalky crap all over the fabric in the edges of the window - it's very tough to get off.
Is there a prodict that is clear - perhaps a gel of some type???
Thanks.

[DALE DORIA]

I use Meguires #17 Clear Plastic Cleaner. It works OK....... I never can get the rear window as clear as the dealer can. I believe you can purchase Meguires here from Fastlane.