Apply Tropical Roots Stimulating Growth Oil to hair and scalp. Use your fingertips to massage into scalp. For hot oil treatment: Apply Tropical Roots Stimulating Growth Oil to hair and scalp. Use your fingertips to massage into scalp, place a plastic cap over hair and sit under a warm dryer for 5-10 minutes. Rinse with lukewarm water. Towel dry and lock with Tropical Roots Locking Gel.