I got a new one this morning... super sniffing!
A beer I once was making, years ago, exploded in my shower and bathroom. This is one I used to use as a brewery, but having since moved out of my wife's room and into the basement office and bathroom mini "apartment," I've cleaned it up.
This morning, showering, I could have sworn I was smelling pot, over and over - especially near the wall of the shower or using one razor (that sits on the shower ledge). I've smelled it once or twice in the past... though I've never used it ~ I've heard that smell memories are perfect and this is the first time I've noticed. Well... there's never been pot in my basement (not that I'm aware of), but old old hops smell like it (the plants are cousins, though hops have none of the drug in it). I finally figured it out and realized my sniffer had come in.