Using this Bobrick soap dispenser is a breeze. First, install 4 D-Cell batteries into the battery pack. Then, insert the soap refill into the dispenser. When you place your hand under the dispenser, it will automatically dispense 0.8ml of soap. Keep an eye on the LED indicator. If it flashes red, it's time to refill the soap. If it shows yellow, replace the batteries. To maintain the dispenser, clean the spout cover assembly regularly with a soft, damp cloth. Avoid using abrasive cleaners as they may damage the bright polished chrome-plated plastic. Also, make sure the dispenser is placed in a dry area as it's water-resistant but not waterproof. When adjusting the motor for different cartridge sizes, follow the simple adjustment steps provided in the product manual.