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Copper cookware can quickly lose its attractive finish in the dishwasher.
Strong detergents and high temperatures may cause:
Tarnishing
Dark spots
Discoloration
Loss of shine
Different copper cookware may also have different linings, so care instructions can vary.
Better care
Hand wash with mild soap and warm water, then dry immediately.
Use a copper-safe polish when necessary.
8. Antique or Valuable China
Old, hand-painted, or valuable porcelain deserves special care.
Older pieces may have:
Fragile glaze
Gold detailing
Hand-painted patterns
Small existing cracks
Delicate decorative finishes