One of the dinners I recently made had onions in it. I don’t cook with onions very often but this was a new recipe so I added them. You forget how long after you cook with onions, the smell sticks around. The following day we left the house and came back a few hours later and our house smelled like bad odor. I knew it was from the onions but if someone had come by, they wouldn’t have. I’d like one of those air cleaners because I can’t stand a smelly house.