Hi all
I use Bro. Adam type feeders with a 25 mm hole through the central block.
The inner surface of these holes is quite rough and fibrous (particularly
after being hosed down for cleaning). The bees chew these fibres off and
carry them through the hive and chuck them out of the entrance.
Regards From:- Dave Cushman, G8MZY
Beekeeping and Bee Breeding, http://website.lineone.net/~dave.cushman
IBList Archives, http://website.lineone.net/~d.cushman