I read somewhere if you can prevent the queen from leaving the hive the rest will not swarm. I've tried on that on 4 colonies by using queen excluder material over the bottom entrance and a full queen excluder above the brood boxes. So far one hive has attempted to swarm. the bees have left the hive on 3 of 4 days. Within a half hour they return to the hive. Success, I guess. Now what? do they continue to attempt to swarm? That seems unproductive. Do I need to add brood space? Will they eventually quit trying? Please advise.