You can also try to hand feed. Mine didn't eat greens until I waved it infront of her face...she licked it and just ate it. Then (and now) she gobbles her greens first.
You can also try putting something in there that is moving like a silkworm (a wax worm will work too--not too many...one or two max!) Sometimes they ingest the greens by accident and decide that it isn't too bad.
You can also try just giving it time. I had a dragon once who just decided to try them out of the blue. (I guess he figured they were in the tank long enough he might as well see what is up with that.)
I wouldn't with hold crix all together...however, you can feed twice a day (if you aren't already) and give a few crix and a salad, then at the next feeding offer only crickets.
I had a hard time introducing pellets into my girls meals. She would eat around them. Then I made a mixture of frozen veggies, and pellets and spoon some out...they end up all tasting the same, and she went for it. Now she eats them everday (with other stuff of course).
Good luck..I know how frustrating it can be to try and feed these guys the good stuff. (They can be like a child...not willing to try something new).

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Hangin with the Herps
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