I have been using freeze-dried bloodworms, expensive stuff, sold as food for tropical fish. I had been powdering it and sprinkling it on my CP.
I recently invested in a free supply of very similar material. I purchased an electric bug killer. It uses a blue fluorescent light and a high-voltage electrical contacts to lure and kill insects that fly at night. I placed a glass mixing bowl beneath the device and most are still in the bowl the next morning. I must get there before the birds clean out my bowl. Some are just stunned so I put the bowl in the microwave on high for 15 seconds. Then I dump them into a smaller plastic container which I place on my fluorescent plant light ballast to dry them out. Once they are dry I grind them with a coffee grinder, electric. Dry them out a little more and then rub them through the screen I have been using for the freeze-dried bloodworms. So far, so good.