No detergent needed. Clean with just water. For cleaning bathroom floors, bathtubs, chairs and more. The brush has been processed with the special raw thread "Bell Couple (R)" to a moderate level of firmness. The brush thinner than the hair is difficult to damage objects and removes dirt all the way to the corners. It removes dirt without using detergents, so you can easily clean it every day. It drains well and dries quickly, making it hygienic. Removes limescale and sebum stains on bathroom floors, walls, bathtubs, chairs, tubs, etc. For removing limescale and sebum stains from bathroom floors, walls, bathtubs, chairs, tubs, etc. / After use, please cut the water thoroughly and dry it out. Use detergent for severe areas.