1, you need to wear a bib before use to avoid shampoo polluting your body. It may turn black after oxidation and cannot be washed away. 2. After opening the package, there will be gloves inside, which can be reused. Wear it before washing your hair to avoid blackening your nails. 3, after use, be sure to cover the bottle, to avoid the shampoo into the air and oxidation, affect the use effect. 4. Press the bottle mouth hard, put it in the palm of your hand and stir it evenly with your fingers. 5, hair dry coating, foam, especially hair roots and sideburns. 6, massage for about 10 minutes, pay attention to observe whether it turns black.