My wonderful dealership decided to used water downed washer fluid in my last service. Water does not work well when temperature is in the 20's. Completely froze up my system. I had to find a warm place to thaw out my washer fluid and then use it all up so I could flush the system with new fluid. They are going to get an earful next time I'm in for service. I just hope they did not damage my pump. You have to love good customer service.