Worked for me
Sorry to drag this up from the dead. I had to try this, and it worked. I have used WD-40 for years, yes it does kind of work for an electrical connector dryer ie. distributors and light connections, others are better.
I sprayed throught the top in behind the switch and then lifted and in the crack there. Kind of filled the little well up with oil and then worked the hell out if it. Didn't do anything at first, but left it over night and worked the switch more the next day added more WD-40 and then it started to get action.
Seems to be working after two days, just waiting to see how long it will last. I'm not going into the door for a while yet, cleaning the contacts is going to happen then.
Thanks! Another score for the forum.