We have some poorly designed hivetop feeders which came free with some other equipment. They used floats and had no screens and drowned alot of bees. So I modified one (which I am using on a weak hive) by installing 1/4" screen in a "bell curve" pattern over the entrance to the feeder hoping to give the bees something to cling to. Now it seems that I have constructed a death trap as the number of bees drowning has doubled. Also, I cannot clean the dead bees out which are under the screen. Any thoughts?