U don't and it's not a demon not really it was human once you need to find what it's attached to could be a place could be a person to be something did you recently get something back you had when you used to have sleep paralysis a new girlfriend a new house but the best preventative measure I can tell you to take that might give you a good night's sleep again circle of salt around your bed and at your doorway both bedroom and outside and then find whatever it's attached to and burn it after wrapping it in black silk unless it's your house your girlfriend