I begin noticing this dried up water mark down the middle of rear hatch window since day one. Thought it was just leftover water from carwash. But after repeatedly cleaning it off, it would appear the next day.

I am wondering if the rear window washer is being triggered when the car is started/stopped. I noticed the front wipers would move sometime when I stop the car, eventhough it hasn't been turned on in months.

Has anybody else noticed this?

 

It's funny you should mention this. I noticed the same thing a while ago but was too lazy to do anything about it. Then when I took it in to get the headlamp recall done I had them look at the rear hatch wiper. They ended up replacing some stuff...however with that said I still get streaks. It's like its leaking or something so I need to take it back in at some point.