Begin with a clean eye area free of makeup. After cleansing and moisturizing skin, apply the lash serum along the upper and lower lash lines (like a liquid eyeliner). Next, apply serum from lash root to tip (as you would apply mascara). Wait 1-2 minutes before eye makeup application. Apply 2 times a day as a part of your morning and evening skincare routine. Pro Tip: For even fuller lashes, apply Cils Booster XL Lash Primer to eyelashes followed by your favorite mascara.