u/Curlhead91

My husband and I recently moved into our first home and have noticed a mysterious smell of cigarettes coming from the corner of our master bathroom every so often. It’s not overwhelming and it’s not all the time. The bathroom does not butt up against a neighbors yard. Potentially previous owner smoked indoors, but why would it only be noticeable in the bathroom, specifically in the corner with the toilet? And not all the time?

Any and all guesses appreciated