I've been using a Logitech MouseMan Wheel mouse for about a year. The main reasons I like it are the scroll wheel and the thumb button. Anyway, the ah heck is starting to skip and stick. I popped open its belly and cleaned its ball (poor baby. Only one ball). I also wiped down the three rollers. I've tried three different mouse pads and no pad. Nada. It still skips and sticks. Suggestions?