This replacement brush head for the BaByliss True Glow Sonic Skincare Cleansing System is designed to cleanse and exfoliate areas of the body which may need extra care such as elbows and knees. Use the system daily to be left with softer, smoother and healthier looking skin. To clean your brush head, rinse it in warm soapy water. You should change your brush head every 3 months to get the best performance out of the system.