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Never leave food residue to dry on cutlery, as this can result in tarnishing. If possible, clean used cutlery thoroughly immediately and dry at once. Silver and steel cutlery must not be washed together. The silver, being the softer of the two metals, could be scratched by the harder steel, also the steel cutlery may rust.
Stainless steel cutlery which has become spotted should be cleaned with a non-abrasive stainless steel cleaning agent.
It is not possible to permanently protect silver plated and silver cutlery from getting tarnished. Always treat tarnishes with anti-tarnish cleaning agents which are available in the form of dips, cloths or pastes. Keep your silver in a specially lined cutlery box or cover it with specially impregnated felt cloths. The best care is frequent use and the appropriate cleaning method: Silver and stainless steel cutlery should never be put together in the dishwasher in order to avoid contact corrosion.