Recently I have had issues with my mighty mouse scroll wheel (which would be the same as any apple mouse), where it would stop scrolling back up. By pushing down hard on the nodule would help it work again, but gradually that stopped working. You can actually feel and hear the feedback, and rather than a little click it was smooth.

The most obvious reason for this is that it was dirty, or there was something stuck in there… much like the old mice with the scroll ball on the bottom, you would need to take out and clean the rollers with your finger nails, removing mostly deadskin I pressume!

Naturally did was to try and take the mouse apart, but due to apple engineering, I would end up breaking the mouse, so I needed to clean some other way.

At first I just blew hard, nothing much happen… then I licked the nodule and rolled it, a little happened… then I got a cotten bud and some metho and applied it to the nodule, pushing down and continuously rolling. I noticed a discolouration of the metho, as it was dissolving some of the muck. 10-15mins later after the metho had completely dried the mouse is back to normal, and the feedback is much more noticable.. so if you have issues with your apple mouse scroller I recommend metho and a cotton bud.