I usually take the mouse ball right out and rub it with a cloth moist from rubbing alcohol. You might also want to check the small rollers the ball rubs against to move the pointer. Quite often there is a build up of crud(?) that I remove with a toothpick, but be careful not to let that Krud(?) fall into the mouse...Doug F --- Manage your account options at //www.freelists.org/list/muglo