well actually i had this happen alot at first, and just found a female dubia and hisser living in the bottom of a pet stuff box a month after switching rooms with the master bed and had moved roaches to escape proof tubs, after they had had another litter of babies. unfortunately if she does have babies the hissers need more humidity than the average person's home will provide, so they will die off abotu the first molting time, were the dubia live on and grow. the best way to lure then to you is with the cheap smelly old roy dog food or the purina dry cat food, as it reaks and mine run right out to it besides the preggers, that only come out if i put out oranges mostly that fast in minutes (the wife hated me showing her that trick the first time, as a blaberus ran right up to her and she hates all but the hissers. hahaha). if you want to try to lure her to stay somewere put a heat pad under a paper egg carton, and put fresh cat food and water crystals in it, as thats how i got the dubia nymphs in one spot when i opened a shipment and they exploded out the box in small number of tiny nymphs (right now alls i have is the hisser nymphs that a couple escaped, and wont come out for food, as they were newborns and i had to put out the litter from the parent' tank to get them. maybe you could put the rest in a tiny vented container in a bigger one with just enough room for iut to get in by them and it might stay close to them, as ive found the escapees trying to get in by the rest if alone (i had a human heating pad under my hisser tub, on the floor, but now up on a shelf, so they get into the other roach tubs instead probly).