Sorry to hear about your problem. I have always used Sevin dust and have never had a problem. I usually wait until all of them get on the roost and I begin by taking them down 1 by 1 and dusting them and placing them back on the roost. I put the Sevin dust in a knee high stocking, tie a knot in the end and tap the dust filled stocking all over their body until they are completely covered. Works like a charm.
Good luck and please keep us posted.
Good luck and please keep us posted.