Serum Nuit Anti-Pelliculaire Intensif is a cellular intensive anti-dandruff night serum for sensitive scalps and all types of dandruff. Mode of Use: Apply and treat with Serum Nuit Anti-Pelliculaire Intensif: Apply to towel-dried scalp. Step 1: Take 1 pipette up to the mark. Step 2: Apply 3 doses, section by section. Step 3: Gently massage Step 4: Do not rinse.