To use this 3CE liquid lipstick, simply apply it evenly on your lips. Start from the center and spread it outwards for a smooth finish. When choosing a color, consider your skin tone and the occasion. Remember, once you open the lipstick, it's good for 12 months. Store it in a cool and dry place away from direct sunlight to maintain its quality. Also, avoid sharing your lipstick to prevent the spread of germs.