For some time now my mouse has been harder and harder to position. Jumping and jerking around. The ball on the bottom was very stiff. By opening the mouse (1 screw in this case) I found the ball wrapped in thick wads of lint. It wasn't possible for it to turn freely. What a difference! I am going to definitely clean the mouse on a regular schedule (once a month). Would recommend unpluging it first as a safety precaution.
Mouse Cleaning
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