Brass whistles.....more excessive moisture problems?

Yes, I too have had the horrible whistle clog problem. Unfortunatly, my FAVORITE whistle (burke WBB brass) clogs VERY easily, to the point of sometimes being impossible to get through a tune. The periodically sucking suggestion is not sufficient as …well I would miss an awful lot of the tune. I have not had nearly as much trouble with the Parker made of copper nor my aluminum whistles..a Harper and a Chieftan. Its to the soap dip for my BURKY!!!