Been using one for 10+ years. Had to buy a new one recently and the paraffin wax that they use to trap the dust is getting all over the car. I have tried all their prep that was suggested (letting it sit on newpaper and having the wax 'transfer' to the paper, and washing it with no soap) and while it has lessened the effect, it still leaves wax trails on the car, especially when a part of the brush that does not normally touch the car makes contact. Any suggestions?