Is the 'low 90s' on the hot side on the substrate and measured with a probe or temp gun? Also, the title says waxworms too, how many are you feeding? They sometimes act like a laxative None of my girls will eat mealies anymore but when they did there were always bits of chitin in the poop, I don't find that with superworms or crickets. Do you mean little flecks or still formed, big chunks of worm?