Updates on mine... I went quite a while this summer with no issues. I was parking outside fairly often and it's been hot here so I am using the AC daily. The smell started again a couple weeks ago, but not always. I have been parking in the garage recently, I will add my garage gets very, very hot and there is little airflow.
Had a trip to Springfield on Sunday (150 miles) so Saturday I replaced the cabin filter with a new K&N filter. I also Lysol'd out the filter compartment and let it dry out before replacing the filter as well as running just the blower for 10 minutes so all the vents were good and dry.
Did the 300 mile round-trip and it was perfect. Drove around town Monday no issues. Hot here but no rain.
This morning, after a night in the garage, I fire it up and it's probably worst smell yet.
Yesterday no issues, today nasty smell. go figure.