Separate the two sides and immerse the sponge in water with detergent. Put the safety thread on your wrist. Open the window, fix half of the wiper on the outer window with an anti-drop rope, and install the other half of the wiper in the window. Move the wiper inside and start cleaning both sides. Use high-quality ABS materials, natural latex, and magnets. It has the characteristics of good strength, high toughness and firmer texture, making it safer to use. The powerful internal magnet locks the two cleaning surfaces together. This double-sided magnetic glass cleaner can wipe the narrow area of the window without dead spots. Especially suitable for cleaning high-rise windows. It is very suitable for cleaning household windows, car windows, sliding doors, shower screens or any 3-8mm double-glazed surface. If you have any questions about the product, please feel free to contact us. We are 24/7 on line, and try our best to solve your problem. We also provide perfect after sale service, you could buy without worries.