Performing maintenance on your drones is essential for ensuring their safety and longevity. Pre-flight maintenance should be done before each flight, checking the physical condition, battery level, firmware update, sensor calibration, and connection status. Additionally, you should inspect the drone's surroundings, weather conditions, and flight regulations. After each flight or after a certain number of flights, routine maintenance should be done to keep the drone in good shape. This includes cleaning the body, propellers, and camera lens. The drone and its accessories should also be stored in a dry, cool, and secure place. Periodic maintenance should be done every few months or after a certain number of hours to prevent or fix any issues that may arise over time. This includes replacing worn-out or damaged parts like propellers, batteries, and motors as well as lubricating the bearings, gears, and joints with suitable oil or grease.