when you say clean up poop, what are you doing with it ? If your just putting it in a big pile yournot doing much good. Fly control is a multi pronged attack,
1. manure managemnt,,, IE little to no moist manure, needs to be spread every few days, you can also use feed through supplements, feed textured feeds and keep chickens, or use a drag harrow. You must control the manure.
2. FLy predators. they eat bunches of flys, simple as that.
3. Traps,,,, but you need the right kind. Those tapes and the add water stinky traps, dont work. They attract flys. and the ones they do catch are not the biting flys you have problems with. You need biting fly traps.
4. pesticides for kiling and repelling. Just dont spray where you release the fly predators.