Using this 3D waterproof eyebrow and eyelash hair extension cream is a breeze. First, straighten your eyebrows outwards to get them in place. Then, use the attached pen - tip on the brush to pick up some of the cream. Start applying it from the end of your eyebrow and move slowly towards the front. Make sure to spread the cream evenly along the edges of your brows. Do the same for the other eyebrow. Remember, this product is waterproof, but avoid rubbing your eyebrows vigorously when washing your face. To maintain its quality, keep it in a cool, dry place away from direct sunlight. Also, don't share it with others to prevent cross - contamination. If you experience any irritation, stop using it right away and consult a professional.