Robbing: Not sure if this is robbing, but it looked like a wrestling match at the entrance of this TBH the other day. So I obtained a 1 sq foot sheet of 1/8" HW cloth and suspended it over the entrance, leaving a 1" gap all the way around. I put it there in the early morning when there was no activity. In this configuration, a bee can not go straight into the hive, but has to go around the screen and then make a 90* turn to get into the entrance. It's an end entrance. I'm looking for agreement that this is a satisfactory robber screen. How long does it take for the homies to figure how to get back in? I'm assuming robbers will make an attempt and then give up. Or, do they come in waves? - Mike