Eli5: why are some utensils dishwasher safe and others are not?

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Technically isn’t every utensil supposed to be dishwasher safe? Like what difference does those utensils have?

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Anonymous 0 Comments

Any utensil that is more than one piece uses something to join those pieces together, like a glue or rivets.

They also have seams, such as the wooden handles on a knife, where moisture and caustic detergent gets trapped. That attacks the glue or the metal of the rivets until it separates or corrodes.

Many knives that appear to be a single piece of metal aren’t; the blade may be stainless steel, but often the handle is hollow and again, joined to the blade with some kind of cement.