Some people decide to do the treatment after washing their hair. If you ask me for my opinion, I say that starting out on dry hair is most beneficial. Sounds crazy right? Yeah I know, but let me explain. After hot oiling your hair, it will be greasy so you want to do a good wash with a sulfate free shampoo afterwards. If you shampoo and condition your hair prior to doing the hot oil treatment, you’ll have greasy limp hair, when the session is over. No amount of rinsing with water will remove the excessive amounts of oil that will be left on your hair and scalp, after you have completed the treatment.