Last week I did a deep instpection into all the boxes including the deep super on the bottom for brood. In the past few weeks I added 2 med supers to equal another deep and finally two weeks ago my first super for honey, inspecting last week all 4 boxes had lots of brood, eggs, larvae and everything looked wonderfull. Todays inspection was pretty much the same lots and lots of bees brood and everything in the 3 med boxes but when I got to the bottom deep, it looks like the brood hatched and all those cells are empty, there are brood in other frames in the deep box but about 3 frames just have a little honey and pollen and lots of empty cells. Is there a certain time the frames are empty for cleaning and whatever before the queen will lay in them again? They looked pretty clean already, Thanks for your help. Rhonda