My wife bought me a Coverbond 3 car cover from Tweeks when they were still selling Porsche stuff. This cover is made from a non-woven type of material
and seems to work well. The only problem I have is that after a rain shower, I'll remove the cover and the car is covered with a "dust". I'm thinking I need to clean the cover, but there were no wasshing instructions.

Can anyone tell me if they have a similar type cover and how you clean these?