Using this soap dispenser is easy. Just open the vandal - resistant hinged filler - top and refill it with the appropriate soap. Make sure the soap you use has a viscosity between 100 and 2,500 mPa·s and a pH between 5.5 and 8.0. When refilling, you can check the tamper - resistant refill window to know the level. For maintenance, clean the dispenser regularly with a soft cloth. Avoid using abrasive cleaners as they may damage the matte black powder - coated finish. Keep the dispenser in a dry place to prevent rusting and ensure long - lasting performance.