Hey guys,
I have recently noticed that my rear wiper seems to have an issue with getting my whole window. As you can see in the pics (please ignore the dirty window

), it for some reason always misses that top area. Upon closer inspection, it seems that when the wiper is vertical, it is sticking away from the window in that area. Even when I press it down, on the next run it's sticking away again.
Any ideas what can be wrong here?