- A leave-in treatment proven to promote hair density by reducing hair fall* associated with scalp oxidation. *in 3 months. Night Density Rescue features NIOXYDINE24. 1. Use the pipette to take the product out of the bottle. 2. Starting in the middle of the head and moving from front to back, use the pipette to divide the hair and release one drop every 2–3 cm. 3. Move to the left or right side of the head. Use the pipette to divide the hair and apply a drop every 2–3 cm. 4. Repeat on the opposite side of the head. 5. Using your hands, softly massage the head, spreading your fingers to touch every area of the scalp. Add a little pressure to ensure the scalp moves with your fingers in a circular motion. 6. After massage, gently brush the hair.