Hi David....Any thing here will be from my personal keeping ,feeding, and (attempts) at raising wax worms. The reason I say this is due to some published information about wax worms not living up to the comments. I agree with the temperature of 50 to 60 degrees keeping them for the longest period. But of course that spot is hard to find without a little fridge for that purpose. Most places in the household refrigerator are usually too cold. The other culprit is too high on humidity......After losing them no matter where I keep them I now choose to lose worms by way of the cycle of them going into a cocoon stage or the moth stage that is soon to follow. They say wax worms don't eat after they reach adult hood. I have never figured out how you tell that......so I learned one thing that prolongs their life for me. I'm sure there are others too. I use slices (rounds) of carrot. When I get my monthly boxes of waxies......I first of course, watch my youngsters eat but then I put about 4 carrot rounds in each 250 count box(lay on top). Now I also use feeder stations in my gecko housing that also contains 1 carrot round in the bottom. The wax worms are content to stay on top of the carrot so the gecko can indulge anytime they get hungry. After usually 2 days, any uneaten goes in one container and I feed fresh from another. I do the same thing when I feed my meal worms.......
Take care. HJ