Old Rover hasn't had much use recently, as MOT and work was needed - now done. Got pressed into service over the holidays and lots of the electrics don't work. I know how to sort them - clean the switches. But it's obvious that the switches which have high current loads still work fine, while those switching only relays, so a tiny current, have problems. And all the switches are a similar design.
They are easy enough to strip and clean. All the contacts are plain copper.
So what would be the best type of grease or whatever for the contacts to keep them from oxidising?
Just for added info. The hazard warning switch - a pretty complex switch, but handling the full lighting load - still works fine, despite having little use. The heated rear window one - a simple on/off - but switching a relay, doesn't, despite getting much more use than the hazards. When a switch is stripped and cleaned, the contacts look to be in perfect condition.