fruit will get nasty quick in a cricket container. use potatos and carrots (raw) instead. these provide both nutrients and water and stink much less as they don't rot so quickly.

i use water crystals or this stuff (http://armstrongcricket.com/waterb.htm - most chain pet stores will carry something similar) in a jar lid instead of a sponge. the sponge will also quickly become nasty as the crickets poop all over it and it will mold. the water crystals either get eaten or evaporate so there is no mess and no mold.

i have used these products from petsmart and been pleased:
http://www.flukerfarms.com/index.asp...PROD&ProdID=23
http://www.flukerfarms.com/index.asp...PROD&ProdID=21 (you can use this in lieu of other food as long as you provide a source of water. i do one lid of water bites and lid of cricket chow.)
http://www.flukerfarms.com/index.asp...PROD&ProdID=25 (i have used this before but prefer the bites and chow--this product was more stinky and didn't evaporate the way the water bites do.)