Porter bee escapes

[janeoh]

Thanks Lindsay, that's very helpful. I will give them a little more time. If that doesn't work I will check for drones. Jane

[Thymallus]

I prefer a rhombus myself, much quicker and no moving parts to jam up. Although even they haven't been as effective in this hot weather. I presume that the bees are seeking out the heat from the main hive below the clearer board, but when it's been as hot overnight as many nights this year they don't bother.