Rudy,
I use Fantastik & a soft toothbrush. I spray both sides of the chip & after cleaning the chip I rinse it off with warm water. After I dry the chip off with a paper towel I then use a VERY small amount of Mineral Oil which I rub between my thumb & forefinger & then onto both sides of the chip. Cleaning a dirty chip brings out the true colors of a chip & if done carefully will not harm the chip. From the time I spray the Fantastik until the time I am drying off the chip takes about 25 seconds. I have never damaged a chip yet! Which chip would you rather have in your collection, the one on the left that was cleaned or the one on the right? Andy - Las Vegas