I totally sympathize. We went to a farmer's market years ago and bought a bunch of vegetables. Came home and we both unpacked and put things away. I was working from home so we mainly just used the car on the weekends when doing shopping, errands, etc. Toward the end of the week, I started dinner and went to get the asparagus in the refrigerator. Can't find it. Craig didn't remember putting it away and neither did I. Went to look in the car. This happened at the start of summer so temperatures were up there.
Opened the car door and gagged. Couldn't see the asparagus anywhere. Finally decided to look under the seats. Yep, the bundle of asparagus had rolled under the driver's seat and had pretty much liquefied. We had to take the seat out, clean the carpet under it, wait for it to dry, put baking soda on the carpet, which had to be vacuumed up and replaced several times, then leave the window open for months before the smell finally went away. Never made that mistake again.