DEAR ABBY: I am a man who owns a large four-bedroom home, and I have two tenants. One pays the rent on time, helps with cleaning and yard work, and is an all-around great roommate. The other has been here for four months, has never paid his rent on time and always disappears when we must clear off the driveway or do yard work. The major problem I have with this guy is he sleepwalks — at least he claims he does. He opens doors at night. Some mornings I have found the front door or garage door wide open.