Put the cup of water into a medium saucepan over medium heat. Bring water to a gentle, rolling boil. Add the herbs, cover the pan, and remove from heat. Let the herb mixture steep for at least 30 minutes.In between shampoos, put a small amount of this “hair tea” on a cotton ball and dab onto any visible gray areas. Most people see a noticeable difference in hair color after only one month. The herbal mixture helps soften and minimize the gray color. Gradually gray color fades and hair returns to its natural color.