Hmm, what is it, and where is it coming from?
Garbage can? OK, take the bag out. Spray can with Lysol. Nope, still around.
Stuff in the fridge? Clean it out, take it out. Nope, still around.
Don’t see any mice poops anywhere, and the rest of the wildlife, the deer, foxes, geese, ducks, coyotes, and feral cats are too big to get in.
What about the crawl space under the house? No, fine there, ‘cept for the friggin’ spiders.
Not that sorta funky smell (called "Nature") that comes from the pond behind the house, which has lots of water plants, and tends to only appear when it is foggy.
The water is OK.
Do mega cleaning.
Nothing leaking from the cleaner under the sink. The smell is different from cleaner, anyhow.
Maybe one of the plants? How about the Venus Flytrap? They use a smell to capture insects, don’t they?
Bathrooms are fine.
What the hell is that smell, and where the hell is it coming from? I’ve been doing this for a week!
Hmm, couldn’t be those apples in a basket on the table, could it? Crap, guess it is.
Whew!!!! Mystery solved.
Well, sounds like you got some cleaning done in the process; so, not a total loss.
Well, yeah, there is that. Going to have to remedy that :)
Sounds like ya had a dog day afternoon! Who let the dogs out? – Three Dog Night 2007