I find chunks of raw carrot work great to provide an easy and cheap source of water for my crickets, mealworms and superworms.
I also give the crickets greens (buk choi or puk choi mainly) and even left over hits of mulberry leaf (from the silkworms (if looks a bit less than prime - the crickets get a go at it rather than risking my silkworms), the superworms don't mind the whites off the choi leaves either and the dead crickets (so long as they aren't stinky) , but only get them in winter when the wild skinks who live under the house , in the garden and shed disappear.
I replace the carrot pieces if they start getting slimy , usually 3 or 4 days in summer, a week in winter (if the crickets don't disappear their chunks first).
I've tried slices of apple , and slices of raw potato , wound up with drunk crickets (the stuff starts to forment went going off).
Not a lot goes to waste here - the dead crickets and worms ==> wild birds and skinks (and occasional jacky or water dragon) and I discovered we have a few wild velvet geckos hanging about too , unfortunately no wild frogs (next doors cat exterminated my colony of wild frogs a few years ago).
The left over BT and beardie salads goes to the crickets , and some goes outside (the wild skinks make fast work of it).
The cricket and silkworm poos goes on the lawn - garden.
