Asked by: Amelia Sharp, by email
It’s difficult to do much harm to a CD/DVD machine just by playing a damaged disc. Unlike the needle on a record player, the laser doesn’t make contact with the disc. So scratches and blemishes won’t cause any harm. But a dirty or greasy disc might smudge the laser and cause problems that way. And a disc that’s warped or misshapen might mess up the workings of the player too, I guess.