I just purchased a 2006 black gt. today i noticed some (many) cloudy/foggy streaks in the rear window glass in the late afternoon sun. I bought the car last Thursday and had not noticed it until today. I tried to clean the glass inside and outside with windex but the cloudy/foggy streaks seem to be IN the glass!

Has anyone ever heard of this or what causes it? I am taking it to the dealer tomorrow but it is 50+ miles and was just wondering if anyone had any explanation - please let me know if you need a better description.

Any help or feedback is greatly appreciated. Thank you all in advance!