Wash hair with ProAddiction Clarifying Shampoo. 2. Blow dry and comb hair. 3. Apply Multi-Protein Straightening System to small sections of the hair, starting ¼-inch from the root. Comb product through all the way to the tip. 4. Cover the hair with a shower cap and leave to process for 30-60 minutes. 5. Rinse hair thoroughly with clean water. Do not use any product. 6. Blow dry hair. 7. Straighten hair with a flat iron. 8. Wash hair with ProAddiction Hydrating Shampoo followed by ProAddiction Hydrating Mask.