Question: do i have to wash my hair before olaplex 3?
Answer: First thing is first; If build-up is present such as oils, silicones, or too much product, give the hair a light shampoo and towel dry thoroughly, then proceed with applying the No. 3. You can use it on dry hair as well, it will just take a little more product in order to fully saturate the hair. The choice is yours!