there seems to be too many dead bees in my top feeders
1) If you use too viscous syrup, bees will stuck into syrup.
2) If you have too big liquid openings and other bees press them under the liquid.
3) If the surfaces are too slippery for bee's claws, you should handle them with sand paper.
4) If you fill at once the container, bees in the suckle department will leave under surface. Let bees move away when you put more liquid.
5) If syrup is too hot, bees will die under surface.