how do i get this stuff off and keep the rubber looking nice? i think you know what im talking about, that growth that comes on the rubber trim around the back windows? it was o there when i bought the car, and i heard a brillo pad, like the green thing you wash dishes with, works. but i ttried a little spot, and it seemed to dull the balck look of the rubber? any suggestions? has anyone had this problem and solved it before. thanks a lot on advance