If you use a cleaning crew you don't need to clean your tubs often at all for any roaches. Just add dermestids if waste is building up. The nymphs will burrow in the refuse/ substrate. Another good roach tip is to mix a bunch of dry food with coco husk for substrate, add thin slices of oranges once a week and as long as the temps are above 80 they will reproduce, optimum reproduction seems to be around 84-85 for discoids, Dubia are similar.