george the ghost

okay there is ghost named george that has lived in my house since my mom was little. he likes to hide stuff from time to time but it always turns up within a day or two. well he usaly just takes little stuff: toys, nic nicks, stuff like that but now it took my step dads only set of jeep keys. we have looked every where: inside and outside of the house. my step dad even tryed burning sage to cleanse the house and asked george nicely to return the keys. we have thought about ouija boards and seances but everyone tells us that ouija boards aren't safe. does anyone know a safe way to use a ouija board, hold a seance, or any other ways to communicate with spirits? we r thinking about trying to get a preist to help us if we cant get the keys back ourselves. our only other option is to have the egnition in the jeep changed. so can you please help??