Not a problem, take some all purpose cleaner, (like 409 or simple green) deulte it 30% or so. Buy a toothbrush and spray some cleaner and rub gently with the toothbrush, it should come right off. Make sure you condition the seats after it dries. (a few hours) Put the toothbrush in a bag marked "auto only" otherwise your teeth will turn black
. check my web site for leather care items. post the results. Gary