To use this Manic Panic Amplified hair color, first, make sure your hair is clean and dry. Then, apply the color evenly to your hair, starting from the roots and working your way to the ends. Leave it on for the recommended time, usually around 30 - 45 minutes, depending on how intense you want the color to be. Rinse it out thoroughly until the water runs clear. Before using it for the first time, always do a patch test on a small area of your skin to check for any allergic reactions. If you experience redness or itching during the patch test, don't use the product. To maintain the color, use a color - safe shampoo and conditioner. Avoid excessive heat styling as it can fade the color faster. Also, try to protect your hair from direct sunlight, which can also cause the color to fade.