Using this oven thermostat is easy. First, make sure your oven is turned off and cooled down. Locate the old thermostat and carefully remove it. Then, install the new thermostat in its place, aligning the mounting holes and connecting the terminals. When you're done, turn your oven back on and set your desired temperature. As for maintenance, keep the thermostat clean. Wipe it down regularly with a soft, dry cloth. Don't use abrasive cleaners as they could damage the thermostat. Also, check the connections every few months to make sure they're secure. And remember, if you notice any problems like inaccurate temperature readings, it's best to get it checked by a professional.