I just put a shallow food container of dirt, about 2'' deep, in the cricket bin under some egg cartons and have a heating mat under the bin so it stays
about 80F.
I leave the dirt in there for a few weeks, misting it with a little water every
day.
Then, I remove the dirt laying container to a empty tub with another heating mat under it and just keep it damp.
It takes weeks for them to hatch and they are super tiny.
To water them, I get some paper towels, wet them, and roll them up into a cigar shape and stick it in the tub.
Last time I tried to hatch the brown banded cricks from Ghanns, I had no luck!! they either did not lay, or the eggs died.
I have been told (take with grain of salt) that the large crick farms erradiate them to make them sterile to keep people from
breeding them.