Either they are thinking of leaving or there are too many bees for the box in the heat. Do you have some lemongrass oil? Some lemon pledge? If the bees are NOT in the box, you could spray it with Lemon pledge. If not you could spary a klennex with lemon pledge and put that in the hive.
The smell is the nasonov phermone and will help them get together. If you have another box, I'd spray the inside of it with lemon pledge (or put a few drops of lemongrass oil on the top bars) and dump and brush all of the bees into. They may decide they like it better. Sometimes you have to just keep putting them back until they settle in.
A frame of open brood also might entice them in.
The smell is the nasonov phermone and will help them get together. If you have another box, I'd spray the inside of it with lemon pledge (or put a few drops of lemongrass oil on the top bars) and dump and brush all of the bees into. They may decide they like it better. Sometimes you have to just keep putting them back until they settle in.
A frame of open brood also might entice them in.
