Using this door interlock switch is easy. First, make sure your washing machine is unplugged to avoid any electrical hazards. Then, remove the old switch carefully and replace it with this new one. When installing, ensure it's properly connected. Before starting your washer, double - check all connections. As for maintenance, keep the switch clean and dry. Wipe it gently with a dry cloth if it gets dirty. If you notice any signs of damage like cracks or loose connections, stop using the machine and contact us right away. Also, remember to always check if this switch is compatible with your model before purchasing.