A demon in a room is a bad thing, as you can see by this video I made recently:

A few days ago, I was knocked out cold by a group of demons, who had been lurking in and around my bedroom—and, consequently, harassing my cat, who was hiding under there. Like three other times in the past, they recorded the incident with my own cellphone. This is what that looks like.
So, suffice it to say, you should listen to advice very carefully…
If it has a nose, it breathes air. That means you could make the air intolerable for breathing, and cause the demon to leave. While just as dangerous and deadly to humans and animals as they are to air-breathing demons, certain mixtures of common household cleaning products make air unbreathable.
Consider all lives at stake, and weigh the need next to the legality prior to any such undertaking.
If the demon has ears, it can hear. Repetitive or loud noise is another possibility—provided you are not a nuisance to anyone. That will take longer, and will prevent comfortable use and the enjoyment of that room for the length of time it takes to drive the demon away; but, I’m assuming that’s already the problem.
If the demon has eyes, it can see. A flash camera in the dark is a particularly effective way of temporary blinding them.
If none of these are feasible to you, notice two things:
- I didn’t advise you to get righteous or pray (this is my advise for everyone, regardless, because everyone needs to do them); rather, my recommendations imply that demons are subject to the same physical danger as humans. While they may be afforded protection per the unique nature of their biology and native origin, nearly any action that is offensive to the eyes, ears or lungs will be a deterrent to intrusive and harmful occupation of your living space.
- I didn’t advise you to wait and see what happens, or to exercise your option to do nothing.
It is your duty and responsibility to act decisively—if not on your own behalf, then on the behalf of your community. What, after all, were your plans if you were able to get the demon leave your home? Let it flee somewhere to be a problem to someone else? Surely not…
The Kingdom of Heaven is looking for souls who esteem others above themselves. Your responses to life-threatening problems are judged, each and everyone. Share everything you know, at a minimum; find out all you can, at the least.
Anything less than your best response to this danger deserves eternal damnation.
Good luck, and—by God—let me know if I can help in any way: 408–307–5762