Using the Mellow Cosmetics Brow Definer is super easy. First, decide on the shape of your brows. Hold the pencil at a slight angle and use the triangular tip to outline the shape along your natural brow line. Then, start filling in the brows. The smooth - gliding formula makes it simple to add color evenly. Remember, this is a final sale item, so make sure you're satisfied with your purchase. To keep your brow definer in good condition, store it in a cool, dry place. Avoid exposing it to extreme heat or cold as this could affect the quality of the formula.