Hello, After owning a wireless mighty mouse for just over a year, it seems that the scroll wheel does not respond when I scroll up, but it works in all other directions. I really hate the magic mouse and don't want to upgrade. What can I do? I have found a solution on Apple forums: "The easiest thing to do when the wheel quits working is this: 1. Wash your hands, 2. Use a Clean piece of white paper, turn the mouse belly up and scroll the wheel across the paper and in circles. Watch for your pointer to start moving. You will notice that almost immediately your mouse will begin scrolling again without a problem... I do this once a week just for grins and I've been using the same mouse for 2 years (even though my cat chewed the cord) without any problems. I'm going to buy another one because I love this mouse!"