"Old car Smell" Help

my 1 (of 2) roommates left a bag of mushrooms in the fridge and they went bad. stunk up the fridge bad so we put them in her car under her seat. OMG that car stunk for a week before she asked me to see if i could find the dead animal in her car. i reached under the seat and grabbed the baggy and we had a good laugh. She was pissed but was as dumb as a box of hammers so she got over it pretty fast. Smokin hot though....went bipolar 10 years later and ended up on the street. What a shame.