By definition, a dishwasher is a mechanical device that is used for cleaning dishes and cutlery. The act of manually washing dishes involves a lot of physical scrubbing and rinsing to remove the dirt, grease, and food remnants on the dishes. On the other hand, an automated dishwasher cleans the dishes by spraying hot water, that is generally of the temperature range 45°- 75°C. The temperature can be altered, based on the level of the delicacy on the dishes and glassware. Workings of a dishwasher The basic principle behind the mechanical device’s workings is automation of the physical act. A mixture of water at the set temperature is mixed with the detergent and pumped into one or more numbers of the spraying arms, blasting the dirty dishes. This step is called washing. Once the above step is complete, the water is drained. More hot water then fills the cistern to rinse the washed dishes. This is called the rinse cycle. After being rinsed, the dishes are dried using any one of the many drying methods. In most cases, a rinse-aid, which is a chemical–based substance, is used to reduce the surface tension of the warm water. Types of dishwashers Domestic dishwashers These are designed for usage in a domestic household.