your curser either stays in one place, goes the opposite direction and or jumps after you move your mouse?
Ya have to open it up, take out that rubberized metal ball, take some Q-tips and cleaning fluid (I use Alcohol) clean those little wheels and contacts of a year build up of lint, dirt, and pizza drippings!
Makes ya want one of those 36" touch sensitive interactive multi interface use all ten fingers thingy that Jeff Han demonstrates!
I used to play this tank game and had to clean it when i started losing. Amazing how much dirt and crap would be inside on that ball, even though i thought i was keeping that table clean.
I have now an old logitech tractball that i cleaned up and refurbed. It's the one with the giant red ball the size of a cue ball. They don't make this one anymore and I don't know why. It's the best that there is for autocad or for notation or anything, because of it's superior quickness and acuracy of curser navigation. I think they are crazy for discontinuing it, the ones with the smaller ball don't even come close.
I don't even use mechanical mice anymore. Every computer in my house uses optical. Only thing you have to do with those is that if you have a shedding cat who likes to get up on desks and that is taking tweezers and pulling the fur out. This is fairly easy to do compared to the maintenence of the mechanical mice.
Colton J. Provias
Film Score Composer, Location Sound Mixer, and Sound Editor
Full-stack Web Developer