I know Chinese are harder to keep than some people think, I know I've had many, But I also keep a Large amount of Idolo Nymphs L1-4 in net cages and have had only one mismolt in about 2 months out of well over 1,000 molts combined, so I don't think it's the net cages, it might be for lack of enough misting for them to take in fluids for the molts? Plus the flies they eat are fed pure honey(no water or anything else added)for a day first which in turn makes the flies very juicy!
I'm only talking about nymphs here not L5's or up which need more RH and misting to drink. I only have one layer of paper towel in the bottom of the net cages nothing else and they thrive in 85-90 degree with 40-50% humidity conditions.
When you mist it's to get them wet so they drink off of themselves or a near by branch or other object, not just to raise the RH, if they don't have enough water in their bodies they WILL mismolt almost every time, so I mist them directly(even if they get MAD) 1-3 times a day and more won't hurt.
Idolo are easy mismolters so I think this information should help for those with the problem, so you can call me lucky or take this info and apply it?