Ever have your computer mouse stop moving in one direction altogether and justify to either the top or edge of your screen so you shake it and cry and curse the universe and finally buy a new mouse?
Well, go grab youself a phillipshead screwdriver and a needle of some sort (do it now! [img]http://www.**********.com/iB_html/non-cgi/emoticons/new/smile_n_32.gif[/img] ). Take out the screw and pop the top half off. Clean the lint, dirt and dust out of the spinning gear for the X & Y rollers and it'll be just like a brand new mouse! I've never done this before I always just went and bought a new mouse.
(No animals were harmed in this experiment)