what size crickets are you giving him? they should be no longer than the space between the gecko's eyes. do you know how much he weighs?

you can try dusting the crickets with cgd since he does like that--that way he will smell it on the crickets and may be tempted to try them. have you ever offered him any other insects besides crickets? mine really like phoenix worms.

skip the baby food altogether when feeding--it is full of sugar and not good for them. a diet of cgd mixed with only water is a complete one, with or without crickets or other insects. they do grow faster with the addition of insects in their diet, but as long as they are eating the cgd well they aren't completely necessary.