I don't know if this is helpful, but I found out from a breeder at an expo that mine were dying because I didn't take the dead ones out... apparently if you leave the dead ones in, they release toxicities which kill the other crickets. I also didn't have enough air flow. I now have better air flow, water crystals, food, and I keep it clean in there, and I have less die offs. I also started using dubia in conjunction with crickets and I use them both as staples now, and I hardly ever have dubia die offs... I find them dead in the cage because I over dust them sometimes, but that's all.