Copper cleaning involves removing tarnish and oxidation from copper items to restore their shine. Common methods include using natural substances like vinegar, baking soda, or lemon juice, which react with the tarnish to lift it away. Commercial copper cleaners are also available for more stubborn stains. Regular cleaning helps maintain the appearance and longevity of copper cookware, jewelry, and decorative items. It's important to avoid abrasive materials that can scratch the surface. After cleaning, rinsing and drying the copper thoroughly can prevent future tarnishing and keep it looking its best.