I pulled the SBB today and replaced it with a solid board. That stirred them up quite a bit, bees were following me around for 10 minutes. There was a beard of bees outside the front for a half hoor, probably spoiled from having the ventilation during the summer.
Refilled feeder, but am wondering when I should remove it? Is there a certain temp range where top feeders should be removed? Bees are still taking sugar syrup, but have slowed down to 1 gallon every 2 1/2 weeks.