I have 3 hives, each has 2 deeps and a top feeder.The top deeps are full of winter stores .I recently conducted alcohol wash tests and am treating with ApiGuard. Hives have screened bottom boards, but have inserted the sticky boards to keep treatment in the hives. There are lots of bees congregating on the front of the hives.They stay there all night. Are they protesting the ApiGaurd, too warm in the hive or too many bees for the box?