For some reason the scroll down on my Mighty Mouse just decided to stop functioning. The scroll up and sideways worked just fine. It didn’t matter what application I was using either. It was really beginning to drive me nuts!
Searching the Internet I found several sites with people reporting similar issues. A few people had to return the mouse to a retailer but one of the tips suggested worked like a charm for me.
“Take a can of compressed air, hold the ball down, and blow into the mouse”.
I want to note that I held the tip of the nozzle about an inch and a half away from the Mighty Mouse ball, and I used 2 short blasts of air. Happily, now you would know never know that the mouse ball was temporarily unable to scroll downwards.