At one time, we had discussed cleaning the contacts on a Cab1. Some reference here, but unfortunately the older thread is gone. If you can get the Cab-1 apart, a dry soft cloth, can be used to re-condition/clean the touch pad contact points. Aux1 may be the contact most likely to fail first. I had some success with this on older Cab 1's . IMO Mike CT
Some of these Cab 1/Command bases are 20 years old.