Tank is probably a gonner. The bladder in that brand just doesn't last IMO. Looks like condensation is getting everything wet. That will mess up your pressure switch, motor, and anything else electrical in the room. You need a vent or two and a fan to keep out the condensation. Those tanks come with 38 PSI, but if you have a 20/40 switch, you have to let out all but 18 PSI of the air.