To use this VENZEN W makeup primer, first clean and dry your face. Then, squeeze a small amount of the primer onto your fingertips and gently spread it evenly across your face. Make sure to cover areas with large pores. You can then apply your regular makeup on top. Keep in mind that the primer has a 3 - year shelf life, so store it in a cool and dry place away from direct sunlight. If you have sensitive skin, it's a good idea to do a patch test on a small area of your skin first. Also, always close the cap tightly after use to maintain its quality.