Using this dishwasher drain hose is simple. First, make sure your dishwasher is turned off and unplugged. Then, carefully connect one end of the hose (either the 21mm or 24mm end depending on your dishwasher's outlet) to the dishwasher's drainage outlet. Connect the other end to the appropriate drainage point. Before using your dishwasher again, double - check that the connections are tight to prevent any leaks. As for maintenance, it's a good idea to inspect the hose regularly for any signs of wear or damage, such as cracks or holes. If you notice any issues, replace the hose promptly. Also, keep the hose clean by flushing it with warm water every few months to prevent blockages. This will ensure your dishwasher drains efficiently and extends the life of the hose.