General Discussion
In reply to the discussion: I need a new dishwasher. Any suggestions? [View all]stopbush
(24,795 posts)rinse dishes before putting them in the machine.
The new models all have sensors in them that regulate the heat of the water and the length of the wash cycle. That is based on the amount of food etc on the dishes. If the dishes are already rinsed, you don't get as good or efficient of a cleaning. The detergents used today need to have food etc on the plates to latch onto to work at top efficiency.
Just a few years ago, dishwasher manufacturers recommended you run the water in your sink until it was hot before starting the machine. That's no longer true either, as the heating elements in the dishwasher have also improved and heat the water remarkably fast. The high heat of the modern dishwasher is critical in breaking down food and getting your dishes clean.
Hand washing dishes typically uses three to five times as much water as does using a dishwasher, and that's true even if you try very hard to not use a lot of water while hand washing.
See here: http://dishwashers.reviewed.com/features/please-stop-hand-washing-your-dishes