Nothing to do, other than hope they make it through the winter. Has been pretty cold, and they are not flying. At most I sometimes see a little movement inside the entrance.
Added 1" diameter bung, with a couple wires epoxied in a cross across opening to make sure no mice get in and make it easier for the bees to control heat in the winter. They had already started propolizing the larger entrance, trying to make it smaller.
And stuffed some around roof under openings. Think I will leave the sides uninsulated. I have not seen any drones outside or inside for at least a week. Very little activity lately. I don't think there's any flowers for them anymore.