How does dishwasher water temperature affect cleaning?
For the best cleaning results, the water temperature should be 120°F as it fills the dishwasher. Hot water dissolves and activates dish detergent while helping to break down grease on your dishes.
Some dishwashers have cycle settings like the Hi-Temp Wash or the Sanitize Cycle to raise the water temperature during the wash cycle. The Hi-Temp setting helps to cut through baked-on food and residue, while the higher wash and dry temperatures of the Sanitize Cycle can help kill 99.999% of food soil bacteria.