Mary Hunt has a recipe for making homemade shampoo.
I am going to try it out.
This is what you need:
1/4 cup grated Castile soap
1/4 cup of hot water
1/2 teaspoon olive oil
2 tablespoons glycerin
5 drops of essential oil, any scent (optional for fragrance).
In a small bowl, stir the grated soap into the hot water until dissolved. Ad the olive oil, glycerin and essential oil, e.g. lavender, peppermint or citrus, store in an appropriate container with a lid.