Hopefully that is what it is... I am just going to go somewhere that has compressed air and let them blast the **** out of them, I guess. Argh. It's wierd though because I poured water down the drivers side rear corner of the sunroof, and I noticed water trickling down my C pillar. the effin C pillar! Nobody has said this before...

 

This thread may help. https://www.audiforums.com/m_184331/.../tm.htm#303504 . In my case it was water from under the battery getting into the vents.
After you're done with fixing this problem, be ready for a stinking car. I had to spray pine-sol and disinfectants down the air intake. This meant driving in a car that smelt like a rest-room but belive me its worth it.
Good luck.