I have used mealworms on occasion. If i happen to run out of crix, and my order has not come in yet i will place a few small mealies in their bowls. Some of our guys love um, others won't touch um, the same goes for wax worms. Although the no interest in wax worms is good, those guys are like living sticks of butter...toooooo much fat. I have been wanting to try silk worms with my Rhacs tho. Silly-atus fan have you tried it yet?
Anyway even thought they will eat them i do not recommend using them as a steady diet like you would with your leos. Stick to the crix and baby food. Use mealies occasionally. -Mike