Using the Shimano SM - SH56 SPD cleat set is easy. First, attach the cleats to your cycling shoes using the new cleat nuts. Make sure they are tightly secured. When you want to clip into the pedal, just step down on the pedal with your shoe until you hear a click. To release, twist your heel in any direction, and you'll be free from the pedal. As for maintenance, regularly check the cleats for wear and tear. If the cleats are worn out, replace them to ensure proper function. Also, keep the cleats clean by wiping them with a dry cloth after each ride. Avoid exposing the cleats to extreme temperatures and harsh chemicals as this can damage them.