Could be blocked drains, or some kind of chemicals causing it.

You know, they say that smelling odors that are not there is one symptom of schizophrenia . . .

Bro.... take a shower

Time to exercise. Not you, the house.

Sounds like a sinus infection. LOL

Maybe that’s the problem , open a window or something ...lol

If you're careless when you cook onions (ie no ventilation, no closing room &/or closet doors) the smell can soak into everything, couch, curtains, clothes in the closet, and then in hot, humid weather the stink kinda gets steamed back out. My screen porch was used by smokers til about 5y ago when we (nonsmoking) moved in & scoured it clean. But yesterday I was smelling cigs out there because we're in a beastly spell of humid heat.

Could be a refrigerant leak from the fridge - we once had that and it smelt like garlic and onions