Modern dishwashers do not recirculate the same dirty water during the wash cycle, and they are designed to be hygienic and efficient in cleaning your dishes. Dishwashers use a series of water jets, pumps, and filters to ensure that the water used for cleaning is continuously filtered and fresh throughout the washing process.
Here's how the typical dishwasher cycle works to maintain cleanliness and hygiene:
Pre-wash: At the beginning of the cycle, the dishwasher usually performs a short pre-wash to remove loose food particles and debris from the dishes. This water is drained and not reused in the main wash cycle.
Main wash: During the main wash cycle, the dishwasher's pump circulates fresh water from the water supply through spray arms. The water is heated to high temperatures, usually around 130-160°F (55-70°C), which helps to break down grease and effectively remove food residues and bacteria from the dishes.
Rinse cycle: After the main wash, the dishwasher drains the used wash water and refills the tub with clean water for the rinse cycle. This water is also heated to a high temperature to help sanitize the dishes further.
Final rinse: In some dishwashers, an additional final rinse may be performed using hot water or a rinse aid to enhance the drying process and ensure that no residue is left on the dishes.
Drain and dry: Once the cleaning and rinsing processes are complete, the dishwasher drains any remaining water and uses either heated air or a drying element to dry the dishes.
The combination of high water temperatures, detergent, and the constant flow of fresh water ensures that the dishwasher maintains a hygienic environment throughout the cleaning process. Additionally, most dishwashers have built-in filters that trap food particles and prevent them from re-entering the washing system, keeping the water and dishwasher interior clean.
However, it's essential to maintain your dishwasher by regularly cleaning the filter, spray arms, and interior surfaces to prevent the buildup of debris and to ensure optimal performance. Following proper loading instructions and using the right dishwasher detergent and rinse aid also contribute to a hygienic and effective cleaning process.