Do you know if it's a jardini or a liecharti by any chance?(not that it would really matter other then I'd like to know) how big is s/he and how big are the feeders? Do you know if it's a wild cought for sure or not? My jar is pretty pick too... but crickets are irresistable, s/he also feeds regularly on earthworms, meal worms and super worms. If you want to use feeders you could also try toughies or guppies but I'd only feed feeders as a special treat as they often carry diseases bacteria and fungi...