It's not just condensation? It's also when it rains. The water looks like it beads differently there. Also, it is tinted and I've cleaned it twice by hand with very rigorous karate kid like effort.
I just bought it last month, so I'm new to the E92 M9. I had a 2009 335i and a 2010 X5 I traded in that never had this issue. I guess I'm wondering if anyone else had this happen from doing something specific or if the windows heating element has somehow malfunctioned and the result is this ugly ass window. Either way looking for a solution or cause.