They are easy to breed, but eventually will die off probably due to infection. When this happens start a new colony in clean conditions with new adults, dont use survivors, they'll only pass on the disease. For breeding tubs I use takeaway food containers, one inside the other, the one inside has holes in its base and has dampened soil, something like peat or sand. Add water to the bottom tub by prying open the two and pouring water in. Water will be taken up into the soil. Keep them at about 37C, give 12/12 light/dark and feed dog biscuits/ food scraps etc. Have lots of egg cartons for them to hide in. You'll have that many that cannibalism wont be a problem, in fact it might help keep the pop'n down. Keep a lid on for high humidity. Use a deep plastic tub of sorts that allows light in. 7days to pinheads at 37C.