The fans seem to be working; either the little critters can’t materialize, project invisibly, because of the combination of all the swirling floor fans and ceiling fans, or they’re afraid that they’ll be sucked up, or it may be that the electromagnetic interference set up somehow thwarts them.
http://www.book-of-thoth.com/article1607.html

I do now believe that the invisible negative - thought entities (the "Jinns" who give me nightmares with horrible scenarios,) are the same entities who "separated" my astral body from my physical body;I awoke to see that the ceiling fan I’d left on had been shut off, and I awoke drenched with sweat.They had gotten me.

There were odd deeply bright yellow stains on my pillow;endocrine milking?A foiled injection?