The vaseline slows them done and is more effective with the adults. The babies can squeeze through anything and can hide in the oddest places. If you remove anything from the bin, double check every nook and cranny for a six-legged surprise! Canada does not allow dubia roaches to be kept or bred, so I hope I can have a long term hisser colony to provide a safe and healthy change to the worms and crickets most of my guys get now.