●Use in the morning or evening after preparing your skin with lotion and milk. ●After spreading the serum over your entire face with the roller, apply it by pulling up and massaging your entire face with the roller. <How to set up for refill> Set the cap of the used main container and the head part with the roller in the refill container. (1) Remove the cap of the used main container. Hold the main container as shown in the illustration, pinch and press the white buttons on the side of the head with your fingers from both sides, and pull out the head part with the roller. The head part will be removed from the main container. ◇Do not wash the removed cap and head part with the roller, but set it as it is. ◇To maintain the quality of the contents, do not use any parts other than Elixir Aesthetic Essence AD. (2) Peel off the seal at the tip of the refill container. ◇When peeling off the seal, be careful not to cut your hand on the edge of the seal. (3) Set the head part removed from the main container in the refill container. Finally, close the cap. ◇The head part has a front and a back. ◇When replacing, be careful not to press the tube too hard.