Why do domestic dishwasher cycles take hours instead of being extremely fast like commercial dishwashers?
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* dishes going into a commercial dishwasher usually were used less than an hour ago and are also pre-rinsed. The food hasn’t had time to fully stick to the dish yet, and can be washed off fairly quickly.
* commercial dishwashers are more powerful at the cost of size and efficiency. Home users would generally rather have a dishwasher that’s cheaper to run than one that cleans stuff faster.
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