Five days is a long time to continue having huge poops if its from old undigested food, but I can't help wondering if the temps at the petshop (or wherever you got them) were way off. If they ate a lot but the temps there were too low to digest properly, then you've done them a tremendous favor by getting them onto appropriate temps!
Other than that, and if it continues, then they must be getting hold of a few of the crickets/mealworms.
Good luck and let us know how it goes please 
>>I got 2 new baby leos on wednesday of last week and they still are not eating, however, they have massive sized poops everyday?! How is this possible???? I offer them mealies everyday..usually no more then 2 end up missing and for all i know they can be escaping the dish. I put crix in there at night and they dont even come out of their hides and i end up wasting the crix everytime. Temps are good. Why these phantom poops for the past 5 days if they arent eating? I mean the poops are HUGE!
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Andrea A. 