Gently smudge the lip liner with a silicone lip brush to make the lip makeup more natural. When using the silicone lip brush, the force should be gentle to avoid breaking the lip brush. After each use, use a tissue to clean the remaining lipstick from the lip brush, and wash the lip brush at least once a week to prevent bacterial growth. The correct cleaning method is also a key point in the maintenance of silica gel products. Although the silica gel material has good performance, if it is not properly cleaned and maintained after use, its service life will still be shortened.