This product is fully cleaned without leaving dead ends and will never be demagnetized. Anti-scratch Velcro on one side of the product. Velcro hooks on the inner brush catch stains on the barrel when the magnetic force moves, making it easy to clean without damaging the glass. , the other side is a high-strength wear-resistant soft brush. The fabric is soft and easy to clean, and the product adopts a floating design that will not sink to the bottom.