I've seen streaks that look to be inside the glass on mine, so I think
I've got, to some degree, a similar problem. I attributed mine to the
"T"-bar garage hanger.

I never find the bed wet (insert your own joke here) when I check, but
I see streaks that the wiper doesn't clear away. I make sure I pull
the seal back toward the glass when I put it on in the fall.