The method of distinguishing the quality of facial cleanser: 1. Try to keep your eyes wide open when cleaning your face, and inferior facial cleanser will be dazzling. 2. Take a small amount of facial cleanser and burn it on a spoon. Inferior facial cleanser will overflow oil and give off a pungent smell during combustion. 3. Using PH test paper, the skin's PH value is 5.6, and the mild facial cleanser's PH value is closer to the skin's PH value. 4. If the PH value exceeds 7, the facial cleanser is irritating and has strong cleaning power. 5, good quality facial cleanser will have a faint fragrance when applied to the face, without greasy feeling, and inferior facial cleanser will be irritating and dry when applied to the face.