You are correct. However you need to learn more about the Scabies Life Cycle. The female Scabies spends her 2 month life burrowing under the skin, laying 3 eggs a day as she travels. As the eggs hatch, the larvae burrow to the surface and dig themselves a "Fox Hole" in the skin. This is where they molt and turn into adults (10 to 14 days). When the male Scabies reaches adult, he leaves the foxhole and travels around looking for a female hiding in her fox hole. After they mate, he dies and she begins a new burrow from her fox hole to lay eggs. She travels up to 3 cm per minute.
They are vulnerable to die from D-E when hiding in their fox holes, or when searching for a mate. They are also vulnerable to suffocating when the Grape Seed Oil clogs up their breathing tube. Grape Seed oil is quickly absorbed into the skin, and it suffocates the female in her burrow.
This is also why it is vital to keep the treatment going for 3 months after the itching has stopped.... to kill ALL the larva hatching from the eggs under the skin..
Google "Scabies Life Cycle" for more. You will have to read many different links to get the full story.
Also vital to make sure your clothing sits around for a week before wearing it. They will die within 3 days without blood.