1. Unavoidable multiple forms of pollution: air pollution, computer radiation, and the harshness of air-conditioned environments.
2. Complex oily dirt: dirt comes in both water-based and oil-based forms. During normal face washing, sebum, sweat, and dead skin cells are often present.
3. Waterproof makeup that is difficult to remove: Using waterproof makeup without removing it can lead to pigmentation on the skin over time.
4. Accelerating nighttime skincare: During the active metabolic period at night, makeup or dirt clogging the skin will hinder metabolism.