Any tips on getting rid of scuff marks on the interior of an X5? I just had my windows tinted and noticed that whomever did it left some scuff marks on the inside of the tailgate (plastic part). I tried rubbing them off with my hand to see if that had any effect, but that did nothing. There's also the shoe scuff marks that idiot passengers leave on the lower inside of the door panels when exiting the vehicle. These I can usually wipe off, but not completely. Anyone know of any special cleaners that can get rid of these?