After detailing my wife's wagon last weekend I went to Home Depot and purchased a roll of adhesive carpet plastic. You can find it in the carpet department. It's usually used in new homes after they lay the carpet to keep workmen off of it. I laid it in the trunk and under all the floor mats and next weekend I'll go back and apply it to the back of the front seats. As anyone with kids a car seat know, little muddy feet don't like to be idle.