Kleen green natural enzymes works to stop crawling.u only need an ounce and add water .it is highly concentrated.im just starting this stage u spray. It on hesd face all over body.it really works i use it on my dog also.non toxic.i use tea tree shampoo n add a little more teatree oik to it.i also use that for body wash.but the kleen green really works.also i just started steaming and i really believe it works on killing these things in my envirement because they are everywhere in your house.take ur phone camera and zoom a little and start lookn at stuff you will b suprised.i think this is why its so hard for people to rid themselves of these.