Burt's Bees Avocado Butter Hair Treatment. Between perming, coloring and styling, your hair can look dry and damaged. Avocado, nettles and rosemary help promote healthy hair growth. You will love the glossy, healthy result. Directions: Wet hair completely. Massage one teaspoon of Avocado Butter Pre-Shampoo Hair Treatment into the scalp and comb it through to the ends of the hair. Leave on for 15 minutes or more. Then wash with hot water and shampoo. Rinse and repeat if necessary. 4.34 oz.