I pulled the car out of (indoor) storage last night, and holy crap! A lot of the interior plastic/vinyl surfaces had mold growing on them!
The steering wheel in particular was super gross -- a fine green fuzz all over it. I wore work gloves to move it.
The last time I'd checked on the car was in May, and it was fine. I'm not sure what happened since then.
This is a car I was planning to neglect in terms of cleanliness (reformed car neat freak here!), but I just spent 45 minutes wiping down every inside surface with a bleach/water solution. Still need to vac/shampoo the seats. This is NOT how I want to be spending my time!