Yes. We took such apart, sprayed it with an alcohol spray and in one case, put in a new switch cannabalized from an older dead mouse. But its rare to find people with screwdriver and solder skills.
I have a logitech marble trackball mouse, and, well, since I often eat lunch at my desk the left key has gotten sticky. Can this be taken apart and repaired? I'm not talking about the ball, that's fine. --fj