Using this shower arm diverter is a breeze. First, make sure it's properly attached to your standard shower arm. To switch the water flow, just use the push - pull mechanism. Push it one way to send water to the showerhead and pull it the other way to direct it to the handshower. As for maintenance, keep it clean by wiping it down regularly with a soft, damp cloth. Avoid using abrasive cleaners as they can damage the surface. If you notice any leaks, check the connections and tighten them gently. This will help keep your diverter working well for a long time.