Cleaning the underside of your lawn mower is crucial to knowing how to maintain a lawn mower perfectly. Doing so helps ensure that your machine performs better and helps maintain a beautiful lawn throughout the year. Before you clean the underside of your device, ensure that it is turned off. Check whether the spark plugs are disconnected, and use a brush to remove any dirt, debris, or stuck grass. It is advised to avoid using water directly as that may cause rust. You may use compressed air to remove any stuck grass.