Experts warn that pre-rinsing will confuse modern dishwashers because they will think the dishes are already washed … so how exactly do they know that dishes are / aren’t washed?
In: Technology
They do a pre-wash cycle that rinses the dishes with plain water to see how dirty the water gets (basically shine a light through it) during this cycle. It then works out how dirty they are likely to be.
That is also why you put the detergent in a closed receptacle in the door – it doesn’t drop into the water until after the pre-wash.
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