Using this hose is straightforward. First, make sure your dishwasher is turned off and unplugged. Locate the heater and the upper spray arm inlet at the back of the cabinet. Then, connect one end of the hose to the heater and the other end to the upper spray arm inlet. When installing, ensure a tight fit to prevent water leakage. As for maintenance, regularly check the hose for any signs of wear or damage. If you notice cracks or leaks, replace the hose immediately. Also, keep the hose clean by wiping it down occasionally. Remember, this hose comes with a guarantee, but improper handling may void it, so always follow these instructions carefully.