Dermatologist-developed Brush was designed with two types of bristles for targeted cleansing. Angled tip tilts deep into T-Zone. Gently but thoroughly cleanses larger areas like cheeks. Draws out impurities for smooth, glowing skin, purified pores. How To Replace Brush Head: Hold Brush head, angled tip facing up Gently but firmly press the Brush head onto the round disk until you hear a click. Replace Brush head every 3 months for best results.