Nail polish remover instantly paralyzes and kills bugs. All of them. Don't ask how I know. Ummm....diatomaceous earth also does for insects.
IN regard to skin....I find that witch hazel is the best toner, mixed with organic aloe juice, and tea tree essential oil.
For hair....banana baby food, honey, sour cream, yougurt, and coconut oil make an AMAZING moisturizing protein treatment