If you are a first time user with more than 50% gray or more than 10 inches of hair, you will need two kits to fully cover all of the hair. Start by using both pretreatment packets together to cleanse the hair. Open up the first kit, and apply Step 1 and after 10 minutes apply Step 2, and leave on for 15 minutes. DO NOT RINSE. Open up the second kit, and repeat Step 1 for 10 minutes and Step 2 for 15 minutes. Wipe away any excess between the steps with your gloved hand, and be sure to massage each step into your hair like you would with a conditioner. RINSE. Apply Step 3 from Kit 1. Set the timer for 10 minutes. Apply Step 3 from Kit 2. Set the timer for 10 minutes. Rinse. Shampoo and condition your hair.