How can I effectively restore my copper cookware to its original shine and functionality?

To effectively restore your copper cookware to its original shine and functionality, you can use a mixture of equal parts vinegar and salt to create a paste. Apply the paste to the copper surface and scrub gently with a soft cloth or sponge. Rinse thoroughly with water and dry with a clean towel. For stubborn stains, you can also use a commercial copper cleaner following the manufacturer's instructions. Regularly polishing your copper cookware with a specialized copper polish can help maintain its shine and functionality over time.