Before using for the first time, gently shake the bottle vertically with the cap facing up two or three times before use. After use, close the cap tightly until you hear a click. Leaving the cap removed will cause the brush to dry out and become inoperable. When opening and closing the cap, open and close it straight to avoid damaging the brush tip, and make sure the brush tip does not touch the side of the cap. Shaking too vigorously or dropping the bottle may cause leakage, which may stain the inside of the cap or your clothing. Do not use on an airplane as this may cause leakage. If the color appears too light, the brush feels dry, or the brush is difficult to dispense due to lotion or other makeup on the brush, gently shake the bottle vertically with the cap facing up two or three times, wipe the brush tip with tissue paper, etc., and check the color distribution before use. Store the bottle horizontally.