Using this mascara is a breeze. First, hold the brush horizontally and place it at the base of your lashes. Wiggle the brush gently as you pull it up through the lashes to evenly coat them with the mascara. This helps to separate and define each lash. For a more dramatic look, you can apply a second coat after the first one has dried. As for precautions, avoid getting the mascara into your eyes. If it does, rinse your eyes thoroughly with water. To maintain the quality of the mascara, keep it in a cool and dry place. Make sure to close the cap tightly after each use to prevent it from drying out. And remember, this mascara is specifically designed for female users, so enjoy its beautiful colors and great performance!