I've thought of that. I tried reasoning one day with it that it should really go on, that there were 'better things' for it to do than to hang around. It seemed it was gone for a few days after that. I really do not know what else should be said or done to help it make its way to wherever it is going next. And I am still not convinced it is a dead soul. Supernatural, positively. Dead soul? I really do not know.
it's not normal to have a spirit reside in your house
Perhaps. I'm always hopeful I meet someone else (a real person :-) that currently has a ethereal visitor hanging around. Until then, it really does not bother me and I guess I really do not bother it. But maybe if I asked it to help with the bills...