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Unlike manual dishwashing, which relies largely on physical scrubbing to remove soiling, the mechanical dishwasher cleans by spraying hot (55–65 degrees Celsius or 130–150 degrees Fahrenheit) water on the dishes. First detergent-added water is used for cleaning purposes, and then cleans water to remove the detergent residue.
Some dishwashers have multiple wash and rinse periods within the complete cycle. In some dishwashers, a rinsing aid can be added to the rinse cycle. As there is no human contact during the process, strong detergents may be used which would be too alkaline for habitual exposure to the skin.
Many dishwashers have a heating element to achieve fast drying and sanitation of the dishes. In some models, this element can also be used to heat cold water to the desired wash temperature. The wash motor circulates the water through the spray arms & glance off the cutlery ware to wash plates etc. effectively. Detergent & rinse aid is added to help the washing process.
Some dishwashers use the heating element on the drying process. Others allow the ware to drip dry using the residual heat built up in the chamber during the washing cycle. |