1. Wet hair and scalp thoroughly with lukewarm water.
2. Apply an appropriate amount of shampoo to your hair.
3. Gently massage into a rich lather, focusing on areas with unwanted yellow or brassy tones.
4. Leave on for 5-10 minutes, depending on your desired toning effect.
5. Rinse thoroughly with lukewarm water.
6. Follow with conditioner or treatment if needed.
7. Use 1-3 times a week, or adjust frequency depending on your hair color and condition.