This winter my driver's side mirror started running intermittently on it's own, running to the limit and then skipping there. This seemed to happen on damp days. I took the door and mirror apart, cleaned the switch, and thought I had solved the problem, except now the driver's mirror does not move with the switch. It clicks when I move the switch in the up or down position but does nothing in the forward or backward position. The passenger side mirror works fine. I took the switch apart again and made sure it is clean and everything is making good contact.