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Cutlery made from different materials, e.g. silver with porcelain handles, stainless steel with ceramic or wooden handles must be rinsed in lukewarm water. If the water is too
hot, the metal expands and thus splits the wood, ceramic or porcelain connected to it.
Never leave cutlery with wooden handles submerged in water or detergent! Wood will swell and lose its natural oils. It becomes very grey and splits eventually.
Never leave food particles to dry! The cutlery can oxidize, even steel cutlery, and this may lead to pitting later. To avoid pitting, used cutlery should be cleaned immediately and thoroughly - just rinsing is not enough - and dried off immediately. Clean cutlery
either in a suitably constructed dishwasher or by hand. Do not wash silver and stainless steel cutlery together! The silver could get scratched by the steel, which is much harder and the steel cutlery could rust.
Stainless steel cutlery, which has become spotty in the dishwasher (dried water droplets, calcium, food particles) should be cleaned with a non-abrasive steel cleaning agent.
Cleaning in the dishwasher can cause damage, particularly to stainless steel cutlery because an electro-chemical process occurs during the rinsing cycle. This can cause measurable currents to flow between two metals, similar to a current flowing between the poles in
a battery. This causes the metal with the lower tension to be dissolved. Stainless steel can be damaged if aluminium or silver are in the dishwasher at the same time.