I have found that for used records what works for me is to give them a good cleaning, play a few times, then give them a light cleaning. Some get a third cleaning. I always use my DIY vacuum RCM. Mine is based on a HOOVER for those keeping score. :-) The other part to cleaning records, and keeping them clean, is to keep the stylus clean. I've gotten in the habit of cleaning my stylus after each LP side with a piece of Magic Eraser.