SAFETY FIRST: The dual design allows you to clean windows without standing on them. High quality: ABS, Alnico and extra strong elastics. Practical, robust, resistant to falls and durable. It also provides a safety cord to make sure the magnet doesn't fall out the window. The glass cleaner is suitable for glass from 5 to 12 mm thick. UNIQUE MODERN DESIGN: Thanks to the magnetic design, you can stay in the room while cleaning the windows inside and outside. 1. Hold the safety rope in hand to prevent the glass from falling at high altitude. 2. Rotate rubbed glass. 3. Soak in water and let the sponge absorb the moisture. 4. Add some detergent to the fiber cloth. 5. Aim for the glass for natural adsorption. 6. Start cleaning the glass.