Finding a bad smell
Looking for suggestions on where to look to track down a very bad smell.
In the past, the AC condenser has had a wet dog smell, which I solved with foaming condenser cleaner. This is not that smell.
I suspect it may be a dead mouse, it's quite bad, but I'm running out of places to look.
So far, I have removed absolutely everything from the car, and run an endoscope camera down all of the vents, pulled the cabin filter, scoped the fresh air intake, removed both intake vents at the base of the windshield, looked all through the dash, the rear body cavity access panels, the under the boot tray, around the battery, through the shifter tunnel housing and the handbrake tunnel housing.
I've run it through a car wash, sniffed all the carpeting, looked under both front seats, pulled the rear bench.
So far, I can't see even a trace of rodent activity, and I'm second-guessing the smell. It may smell like bad milk, or perhaps garbage?
I tried using an ozone generator to shock it, and while it improved slightly, it's still present. I've left it outside with all the windows, door and hatch open, same temporary improvement, but I haven't found the source of the smell.
It's never had leak from the sunroof nor into the battery compartment. There's no mould on the carpet when I've removed trim and peaked under the edges.
At this point, I'm just open to other places to look?