Quoted from HookedonPinonics:
Keep on messing with it until it breaks...seriously though it's a pain in the ass. Mine was doing the same thing for awhile. I had to always keep adjusting it. It got to a point where it become so loose that the metal switch just broke off. I have replaced it with a standard switch from Marco and that solved the problem for a long time.
I think I may go ahead and go that route. I looked on Marco's website and there are a million switches. Do you happen to remember which one worked for you?