Quote: My balls rotate freely and don't stick. lol That's how they should be I presume. If you have computer screen or lens cleaner try giving them a good clean and polish (with the unit off of course) and dry. The manual says you can use Windex but that sounds a bit harsh (I'm protective of all my electronics). If you still find they're sticky I think you should get it serviced or replaced. You don't want the volume up ball to stick and blow out some nice earphones.