Wasn't there an actual "Cleaning CD" put out back in the 80's by Discwasher or a similar company that had a brush attached to the CD itself? Playing it spun the brush against the lens....in theory anyway. I believe it came with a small bottle of cleaner to wet the brush with. I could swear I saw this at a Sam Goody in NYC back in the 80's. Did a quick Google search but could not find anything.