Hey there! Using our Crazy Color Vibrant Purple Shampoo is super easy. First, wet your hair thoroughly. Then, squeeze out some shampoo and apply it to your wet hair. Gently massage it into your roots and work it all the way down to the ends of your hair. Let the shampoo sit on your hair for about 1 - 2 minutes. This gives the pigment time to transfer and do its magic to refresh your purple hair color. When it comes to maintenance, use this shampoo in between your regular dyeing sessions to keep your purple hair looking vibrant. Also, always remember to patch - test any new product before you start using it regularly. Just put a small amount on a patch of your skin and wait to see if there's any redness or itching. If you experience any of these, don't use the product anymore. And that's it! Enjoy your beautiful, long - lasting purple hair with our shampoo.