A fellow beekeeper has been back to the same house every year for 5 years to remove a swarm from the same place. Sounds like he is not doing a good job of sealing, though he says that he thinks he does. But they still keep coming back. He thinks they smell some remaining comb that he is unable to get to. Is that a deal breaker, or is there a technique he can use to discourage them from entering again should they find an opening. Spray with Honey-B-Gone? But how long will that last? Stuff with some sort of smelly material? I feel sorry for him. Pack all possible entry points with steel wool? It must be hard to find every possible re-entry point, but the bees are insistent on setting up shop in the same location each year. Any suggestions?