Glad I found this thread. I have the white fog coming from my vents as well. Fogged up my windshield and had to drive home with the passenger window down. Wondered what it was. I had no odor though. I didn't smell any antifreeze at all. (sweet celery scent) I didn't notice any wetness on the floorboard, but didn't know to check it. I hate that you have to take the dash apart! I was hoping I could do this work myself to save $$ The part is only $39.99. I hate paying the shop. ; )
Gonna go check the floorboard now.

2000 Durango