Wear gloves
Wash the copper with warm water and mild dish soap
Rinse thoroughly
Dry completely with a soft cloth
Mix equal parts white vinegar and salt
Apply the mixture with a soft cloth
Gently rub the tarnished areas
Rinse with warm water
Dry immediately
Use lemon juice and salt for tougher tarnish
Rub gently with a soft cloth
Rinse and dry
Apply a copper polish if needed
Buff with a clean microfiber cloth
Avoid abrasive pads or harsh cleaners
Store copper in a dry place