Hi,
My mouse is going weird..

Sometimes, for no reason I can see, the pointer isnt where it should be. It allways ends up being 5 or 6 millimeters to the bottom right on a angle of 45 deg, if the top of this slash is the pointer \ my click would be at the bottom of the slash.
It isnt constantally doing it, and cant see a pattern happening.
To fix it I have to give the girl a warm kick in the guts.
Mouse - Genius Optical.
OS - Win 98 SE.

Any ideas..

Cheers,
Ken.