I'll second what Clay said, crickets are a pain in the ---well you know
.
Whenever I need some baby crix [for feeding VERY small slings] I put a dozen or so fat female crickets in a tub with some wet potting soil and wait a couple weeks. I then have more than I need.
I also raise roaches and mael worms, both are easy as all heck to raise and the roaches I raise can not climb glass like hissers.
Any other cricket sizes I need I just buy them...wwwaaaayyyy easier than trying to raise them.
peace