I recently fixed a Sanyo DVD player that wouldn't read DVDs and would
bearly read CDs. It was owned by a smoker and all the pickups internal
optics were coated with tar. I immersed the pickup in a glass of
alcohol which I put in my ultrasonic cleaner to try to clean it. So far
it seems to have worked although I wouldn't want to sell it to someone.

--
Andy Cuffe