Hi guys, I'm not exactly new to keeping roaches since i have a stable colony of dubia roaches for a year now. And I recently got a decent amount of lobster roaches to feed my inverts w/c both species seem to thrive and breed successfully but My new G. Portentosa nymphs keeps on escaping. Petroleum jelly does NOT do the job of preventing the nymphs from escaping. I keep them in a tub and they could pass through the small openings and I see some nymphs around my invert rack regularly. How can I prevent them from escaping. I temporarily solved the problem by taping the sides every time i close it and tape it back again afterwards. Whats the best escape proof barrier for Those troublesome escape artists? Help!!