That reminds me of something I used to do to my friend as a kid. We would go salt water fishing in Clearwater, Fl. I would always slip a live shrimp under his car seat on the way to our spot. Man, did his car stink after a few days. I feel bad now. He died at 29. But those were the days... a jew with a stank 280z...
In this case it’s the juice from the clams that do the work. Just pour it under the seat or in the crease. Once it festers WOW! And when the weather gets warm out it gets really bad.