Dip the Essential Serum brush into the product and close one eye. Swipe the product directly to your top lash line on clean, dry skin, as though you were applying eyeliner. Switch to the other eye. One dip of the brush into the serum is enough for both eyes. The Essential Serum should be applied each evening on clean, dry skin. Once satisfied with your results, continue to apply the product 2-3 times per week to maintain lashes. We recommend evaluating your results after 12 weeks of use.