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M570 Wireless Trackball Mouse.
has anyone replaced the bearings the trackball rides on?
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Usually they just need a good cleaning with a q-tip and some alcohol.
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the ball is sloppy loose, so that ball doesn't track smoothly
sounds like the balls are in a retracted position.
Wash ball with soap n water, dry thoroughly and rub some candle wax (birthday candle) on trackball. Replace ball and move ball in holder in different directions until ball moves freely.
There is excellent info on trackball bearing replacement in the comments of this:
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