Last time we looked in the hive there I would estimate there were at least 50 dead bees on the inner cover of the flow super. Each other time we looked there was just one or two cockroaches, no bees. We have a small mat on top of the flow frames to discourage brace comb, propolis etc- when the cover is in place it loos like the access gap between the top of the mat and the hole in the cover is 6mm or less. I am thinking the bees are finding their way in but becoming trapped and dying.
I suppose we should remove the mat? or-
Are bees supposed to be able to get through that hole in the center of the cover and go up in the attic in the first place?
And if so- what’s to stop them from building comb in the roof? I am guessing the hole is for ventilation and not actually to let bees up?