Sorry, didn't see the link. Makes sense. This afternoon pulled the cover open on the tank and it hissed like there was pressure in the tank. Expanding air pushes fluid out the nozzle? Makes sense. So, refilled tank and left lid ajar so expanding air could escape. So far, no leaking fluid. Sounds like the check valves at the nozzles are bad as suggested. Check valves at washer nozzles? Who knew? Could they make things any more complicated? Friggin' Germans.