Does anybody else have this problem? It's mostly the driver's seat, since I'm usually the only one in the car. I've tried wiping the surface (mainly where my butt meets the seat) with a damp lint-free cloth but that doesn't seem to do much. Has anyone tried any commercial fabric cleaners, and if so, how did they work? Not an earthshaking problem, but a bit of an annoyance in a car that still looks brand new (2012 LT1). Thanks in advance.