I made a trial robbing prevention device and placed it on the porch. It's cut from a vinyl fence that I replaced around my pool. The piece is pretty much square and both ends are open. The bees seemed confused when I first put it out and had the whole entrance under cover so I slid it over to the middle of their entrance to help them out and it did. I'm slowly moving it over so they can adjust to the changes. If it works, I'll glue it in place with some chewing gum or something but for right now it's just sitting there. Who knows, maybe they'll glue it in place for me. Do yous think it'll work?