Ensure you shake the shampoo well before using it. Even though this shampoo does not create the foamy lather like the other store-bought shampoos, be rest assured that it will keep your hair healthy and clean, as it does not contain any harmful chemicals. Additionally, the above solution has about a 2% concentration of tea tree oil. Avoid increasing the concentration of oil above 5% as that may cause scalp irritation. If you are preparing shampoo for a child, then add a maximum of 5 drops.