Sounds like the ghost hangs out upstairs. I'd setup a video camera when I'm gone and see if I pick up anything. Try different rooms, like pointing at the bed. Even while your asleep. You might be surpised. If the ghost doesn't hurt any thing I would be selling tickets. Get a friend to verify it. You may have good proof. I have never seen one, heard lots of strange things but no see. I feel left out. Damn wish I could check it out. Good luck.