Totally agree, @Eva. In the UK and Canada, we called them J-Cloths. But they look identical. 
itâs simple really- the hole only provides honey to the bees sometimes. When it doesnât- the bees see it as void to be plugged with wax or propolis like any other void. They may be logical but they are probably not clever enough to know to leave it open 
Cedar answered this question for me in my first year:
I still see it from time to time but am not too worried, I just make sure the rear of the cap is clear of a propolis plug.
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Nah, we Aussies are very basic, a chux and the Flow Frame cracking key, Also a water spray bottle of warmish water squirted into the channel is a help in cleaning any gunk out.
Regards
@Eva. That is the little suckers Dawn, amazing how much they can hold. A picture is worth a thousand word but I am not a gee wizz on computers.
Thanks
Basic maybe but very basic? Not I.
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How do you tighten the frames, I remember that there was a video on how to but I cannot find it, I have 2 flowhives for 3 seasons now, and would like to do some basic maintenance to them this fall
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@tvalent
Is this any use?
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Sorry @skeggley
I missed you had already linked it in your postâŚ
Thank you for this - quite helpful to quickly find out what Cedar had to say when I discovered this in my flow hive today!