So I finally got the time to wash the car. I tried using a clay bar a get rid of whaterever that is, but to no avail. Here is another picture, how does it look like. As I was looking at the windshield during the process, and also at the picture, I think that maybe the H2Go was somehow removed or reduced in the area where wipers are moving. Hm..
I might buy the glass polish a try it with that.