Far be it from me to judge amounts to feed these guys (read I have no idea, I just adjust feeding depending on if they start to look rolly polly or not), but 1 every 3 days does seem a little meager. You might try a gradual approach to phase him down to that so he's a bit more used to it and not expecting the all you can eat cricket buffet, but rather the cricket salad with a side of fat free waxworm.