But yes, I have disassembled the one in my LTE Elite 4/75cx, cleaned and reglued the rollers and treated them with RR and it worked quite well again, but for most people I would just recommend an external mouse or trackball.
I've actually worn a few mice out; that is, the rollers that are basically either metal-to-plastic support bearings or worse, plastic-to-plastic support bearings have worn the bearings out-of-round. I suppose that those can be repaired, but it's cheaper just to buy a new mouse. Two years ago, I discovered what a great thing optical mice were--nothing like being a decade or two behind the times, is there? :roll: