Failure to clear scabies is often due to a failure in the method of application rather than a failure in the remedy. It is essential that you follow the directions on the label to the absolute letter and leave the lotion on for the full duration recommended. It is also essential that all family members be treated at the same time because untreated people may actually have scabies and not be aware of it and can re-infect other members who have undergone treatment. This can be an absolute scourge for a family and result in the infestation doing the rounds from Billy to Jack and back again. You should also be aware that symptoms might not fully subside for up to a week even after successful treatment.