[Decep]

Hey all, i bought my 2013 with 15k on the odometer years ago but it was unmodded as far as i can tell. Can i assume the rear windshield is tinted from the factory and not the previous owner?

Reason i ask is that in the last few months, i've had a blurry effect on my rear window. I thought maybe i got some ceramic spray wax on it that got baked on there. I've tried everything, rubbing alcohol, clay bar, invisible glass, scraping with a razor blade... im out of ideas. I do see a tiny bubble here and there so im assuming it's a tint failure, not a coating that got baked on there. Anyone else had this issue? Can the tint be redone without messing up the rear defroster?