The skin care tool is for oil control on the go. You can use the oil absorbing roller on your face with and without makeup. The Volcanic roller can be used 120 times generally. After use, the face roller will be dark brown. You can twist the roller’s ring to unlock and pull out the stone. Wash it with soft cleaner, rinse it and then air-dry in a ventilated place. Why We Love It Removes Oil & Shine Like blotting paper, but better. Volcanic stone rolls across face to soak up excess oil instantly for fresh, shine-free skin any time. On-the-Go Oil Control Perfectly portable and lightweight. Drop it in your bag for quick, on-the-go oil control and shine-free skin. Look fresh and get matte in a flash. Volcanic Stone The magic’s in the real volcanic stone. Its unique absorbing properties soak up oil like a magnet and mattify your skin instantly. Reusable & Washable Unlike blotting papers, it’s reusable. To clean, twist ring and pull out the stone. Wash with gentle cleanser, rinse, air-dry, and pop it back in. NOTE: When using the oil-absorbing roller , lift the transparent dust cover directly upward is the correct operation, DO NOT rotate and twist the oil-absorbing volcanic face roller dust cover, otherwise other parts will easily fall off with the dust cover. After falling, please refer to the installation steps picture to reassemble and use. How to fix it? 1. Put the small plastic piece in the handle. 2. put the volcanic stone on the small plastic piece. 3. Twist the ring to lock.