Here is a simple recipe for making your own shampoo at home:

1. Combine purified water and gentle castile soap in a 1:1 ratio.
2. If you want a moisturizing shampoo, add natural oils.
3. For a clarifying experience, add lemon juice or vinegar.
4. Add egg white for extra strength and shine in your locks.
5. To protect against damage, add honey.
6. Add a few drops of essential oils.

Here is a link to a step-by-step guide on how to make natural shampoo that you might find helpful.