Copper is a soft metal that is easily dented or scratched. But, its warm glow and its well-known resistance to bacteria have made it a prized choice of bar tops and counters for hundreds of years. Most copper bars are easily cleaned with simple household products. Because of copper's softness, take care not to use abrasive materials.
Soak a clean towel in warm water and wipe down the bar. This will remove most obvious dirt, such as dust, crumbs or other debris. Use a clean cloth to dry the remaining water from the bar.
Dilute dish soap in water and use a soft, clean cloth to remove dirt and mild stains. Using a circular motion, wipe until the stains and dirt disappear. Remove the soapy residue with a damp cloth and use a dry cloth to remove the remaining water.
Mix lemon juice with water to remove tougher stains. The acid from the lemon will help cut through added buildup that is not easily removed by warm water or a soapy mixture. After using this mixture, wipe the bar with a damp cloth and then dry the counter with a dry cloth.
Slice a lemon in half and dip the sliced end in a bowl of salt to remove extremely tough stains or buildup. The salt will act as a gentle abrasive and the lemon juice will serve as an acid to break down tough spots. Wipe off the bar with a damp cloth and then dry it with a clean, dry cloth.