ever use those Mr Clean magic erasors? those things work AWESOME. Once you clean the seats, you'll be cleaning the door panels, dash, steering wheel and anything you see with them.
I have used them too and was wondering what was in those things because they do seem to work pretty good for seeming like there's nothing to them. They must have some left over stuff from Three Mile Island or Chernobyl or something because they take off just about everything.