I am sorry if you find my methods to be contrite to one another however I am not mixing magic spells with god. I am of the native heritage and am using some things that I did to clear my own previous 3 homes and am suggesting it and if this person/family don't believe in god that's okay try commanding them in the name of love and light to leave that has worked also. Remember this is only advice whether you use it or not is your choice.

It is probably a ghost... you will be able to see a demon... you will probably have to cleanse your house

Not true... spirits can appear to whom they want, when they want.

I agree... I'm a huge supporter of playing worship music in the home. It'll chage the whole atmosphere of the home making it very hard for a demon to keep up a stronghold there.