I am now on my third wireless mighty mouse within 2 years and I am having the same issue with this one now after months of use. The ball no longer scrolls down. Yes, I know all the common tricks to fix it from running it along white paper in circles, rubbing alcohol, etc etc. I just give up with the mighty mouse; I am a apple person who loves everything Apple but this product I do not have respect for. Can someone please recommend me a good bluetooth mouse for my macbook? I don't want it to have a receiver, I want it to have the ability to scroll every direction and also be programmable so i can still access expose and dashboard.