Hand washing is the process of cleaning hands with soap and water to remove dirt, germs, and other contaminants. It is an essential practice for maintaining personal hygiene and preventing the spread of illnesses. Proper hand washing involves scrubbing all parts of the hands, including between the fingers and under the nails, for at least 20 seconds. To effectively wash hands, wet them with clean water, apply soap, and lather thoroughly. Rinse well under running water and dry with a clean towel or air dryer. Regular hand washing is especially important after using the restroom, before eating, and after coughing or sneezing to reduce the risk of infections.