I finally opened up the car cover that came with my 4C. It's really nice! It's the one in the red bag that was in your trunk (if you got it). I just washed and waxed my car last night and decided to cover it while I am out of town this week on travel. My car is parked in a covered garage but it is exposed to the outside and therefore gets quite dusty just sitting there for a few days. So once I return at the end of the week and take the cover off...I assume it's not ok to just roll it up and re use the cover without washing it? All that dust gets caught up in the layers and I imagine would scratch the paint. So what do you guys do and how often do you wash the cover? I guess I could use a duster and take off as much of the outer layer of dust as possible before removing the cover?