Yes, i would say do it again, bleach the cage and scrub the cracks, boil anything that your bp uses, and then do the lice treatment. Can you tell me how you did it? I still reccomend spraying the body, rubbing the head carfeully, and then placing the snake in a deli cup (if she fits, if not get something bigger) but it has to be small so that she cant rub off the medicine and all the mites get exposed to it. When u mix the water and lice medicine it should be strong enough to kill the mites but you dont want it pure, when i did it the mix looked kind of soapy, with some small bubbles, and i only had to do it once and all the mites are gone. I dont reccomend soaking, because the mites will keep going to the head