Put some on about 10 days ago and finally had a reason to exercise them from a little dew and dust on the windshield.

 

Surprise of surprises, they operated slowly, but when I turned the wipers off, they parked perfectly. It could be there was a touch of moisture left to lube the blades, so I waited until the windshield was dried by the passing wind and tried again. And again success. 

 

Has any one else cured mal-parking wipers by going back to the original configuration?

No. I have nos and the still don't park all the way.