Diffuser: Lavender 5 · Sandalwood 2 · Ylang Ylang 1 drops per 100 mL water. Start 30 minutes before bed, then switch off. On the pillow: Lavender 4 · Sandalwood 1 on a tissue slipped inside the pillowcase. Best for: trouble falling asleep, light sleepers, a regular bedtime ritual. Caution: keep ylang ylang to one drop; more can cause headaches.