I recently acquired a PowerBook 180c and found it's trackball didn't produce any vertical arrow pointer movement, so I cleaned the ball, rollers, and the red-eye gizmos, but that didn't do any good. When I use my finger on each roller, the arrow pointer moves just fine horizontally and...
For those who are using ultrasonic cleaners for boards (and other computer related components, if applicable): What sort of cleaning solutions are you using, if any? There seem to be quite a few that seem suitable for use on electronics. Bonus points if they're available in the US :-)
Also, any...