Demons have a hard time coming thr the doors at Nana's.
My grandgirl a couple yrs ago asked me, "Nana why to you have finger print crosses on all your mirrors"?
I did not tell her so as not to scare her.
Monkey Works has some good advice on how to cleanse your home to keep the evils out.
If you think demons are not real perhaps you might want to rethink this.