Hi beeloveds,
at this time of year our bees tend to get the sticky seeds from cadagi trees (Eucalyptus torelliana or Corymbia torelliana) stuck on their boots, and wipe them off at the door as they return home. These then get stuck in the crim safe (or even the open doorway) and can completely clog up the entrance. If you notice this, just brush them off with a stiff brush, or take off the little screen door if there is one and poke the seeds out with something like the end of a paper clip.
thanks for taking the time!
cheers, Juliet