HOW TO: Clean an Optical Mouse
Optical Mice and Laser Mice are quickly replacing the traditional Mechanical Ball mouse because 
they are more sensitive, mouse pointer works on uneven surfaces without the mouse pad and there’s no internal cleaning required since there are no rollers or rotating wheels.
The only issue associated with LED based Optical Mice is that they tend to get sticky over time because surface dust collects on the soft pads located near the light emitter. This can result in erratic cursor movement like it suddenly jumps to a different location on the computer screen or move very slowly or even worse, the mouse may not work at all. How to Clean an Optical Mouse » Digital Inspiration © Amit Agarwal