In a scene from a
(fake) horror movie, like The Conjuring or Annabelle,
featuring demonologists like Ed and Lorraine Warren, we see homeowners who are
very worried about their house being haunted by a demon because there is such a
bad smell in the basement, and they heard demonic presences create foul odors.
So the demonologist couple come over to the house, and ask questions, and then
they ask to see the basement. Well, they smell the smelly smell, and they say
there’s no demon, but to exorcise the stench, use Febreze, because it works
like holy water on demons, causing them to go away.