I have a new C4s Cab that I like to keep meticulously detailed. I have been noticing a Smuge on my driver and passenger window that I can't get off. Today I took my car to my detailer and was surprised to learn that this is a common problem with Porsche. It took him about 30 minutes of hard work to clean the two windows. He said that there is a problem with "wax building up" on the window track and it leaves a "film" on the windows when the window goes up and down.

I wanted to know if anyone else is having this problem? Is this unique to the Cab or does it happen with the coupe also? Does anyone have a way to keep the windows sparkling clean and free of this wax build up? I'm not entirely sure where the wax is coming from. I don't wax my glass.

 

There are pads (greasy) that hold the window in the door when it's down. There is no wax in there. You can have the dealer remove the pads and the streaking will stop.

 

See here:

http://www.renntech.org/forums/index...topic=5260&hl=