i just leave it in the tank and if they dont want it i just replace it tomorrow they should come around also try putting some meal worms in with it that sometimes works.
Eddie...
I got mine onto fruit and veg by not feeding them crickets for 2 days so when the fruit and veg was put in they were hungry... and they've eaten it ever since!
now theres alwas a mix of live and veggie food.... mine love kiwi fruit the best!