Mine is the same way. If you look at that window from the inside, you will see the little dots that are on the window edges cause that line. I don't know how any tint shop could do anything about that.

 

I need to do this to mine.
I have an all white one, and I want to do a pretty dark tint all around and make a white, black and red color-scheme.

anyone have problems with a tinted windshield? I'm thinking I don't want to do it unless there's a compelling reason to do it.