Wash the pewter with warm water and mild dish soap
Rinse thoroughly
Dry completely with a soft cloth
Mix warm water with a few drops of mild soap
Dampen a soft cloth with the solution
Gently rub the pewter surface
Rinse off any soap residue
Dry immediately with a clean soft cloth
Apply a small amount of pewter polish or metal polish made for soft metals
Rub in small circular motions with a soft cloth
Buff with a clean dry cloth
Use a soft toothbrush for detailed areas
Repeat as needed for stubborn tarnish
Avoid abrasive pads, steel wool, and harsh cleaners
Avoid dishwashers and prolonged soaking
Store pewter in a dry place after polishing