IMac mouse has gone wonky

I have the original round mouse that came with my iMac and in the last week or two it has started to 'skip' -- the cursor will get hung up for a second and then move again, but rather jerkily. Earlier this evening the cursor stopped completely, although it seems to work reasonably well now -- if I use the mouse on the upholstered arms of my desk chair! Someone suggested it might need cleaning, but I can't figure out how to get it apart to do so -- I tried Mac Help and it wasn't any help. Any suggestions would be greatly appreciated....

The original Apple Pro mouse cable frays in the chord just as it exits the mouse, over time, and shorts out causing symtoms similar to yours. You can't see the fray by looking at it thru the exterior covering. This can happen to third party mice over time too.
Mine does it. I plugged it into a different port, so the chord exits the mouse in a different direction, and have had very few freezes since. Once I get over my frugalness (cheapness!) I'll buy a new one.
So, try a known good mouse to see if that's the problem. If you still have trouble post back!
Cheers!
DALE

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