Today, in sub-zero temperature, I realized that the night before I had left my intermittent wipers in the on position...took about fifteen minutes for the wipers to literally unfreeze from the windsheild, which is when I noticed what I had done once theywiped the windshield. I turned them off, thinking all was ok, until I tried them on intermittent again, and nothing. They work when I turn them all the way on, although now they stop mid-wipe if I don't let them cycle. Any ideas what I did to them? Anyone? thx.