If you find that your ball mouse is not running as smoothly as it first did. You will find that it has become clogged with dust and fluff. Underneath the mouse you can slide the ball cover anti clockwise and release the ball.
In the hole that is left you will find 3 rollers that the ball runs in. These rollers should have nothing on them. However you will find that they have become clogged with dust and fluff.
Remove all the dust and fluff with a pair of tweezers and blow clean. Once reassembled you will find that the mouse runs smooth again
