There are always arguements for and against certain methods. Ok twisting the crown board on this occasion was probably the cause of the broken comb but..... I always twist my crown board and supers before removing them. I always have and I probably always will. I find it allows a clean lift. If twisting is not done then it is so easy to lift the frames of the box underneath which causes bees to be rolled etc etc. Everybody to their own
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Others are arguing, I'm just trying to suggest alternatives!
I would totally agree with the need to twist supers if frames are stuck.
I've just never had the need to twist a crown board, especially when an eke is on.
AND, because I know there maybe be comb in the eke, I definitely do not twist the crown board.
I just crack it with the hive tool and gently invert it so that no harm is done to bee or comb.
It can then be placed aside out of harm's way until re-inverted and replaced once inspection is finished.
Obviously, if there's brood in there, you need to check for the queen, but a quick puff of smoke or breath will clear the small amount of comb easily.
This can simply continue all season, it's not difficult, honest. I'm no master beekeeper/haver.
Some may not like it, but you can't deny it is easily possible, I've already posted the photo.