In terms of electricity, hotter the water, higher the power consumption. In terms of hygiene, hotter the water, easier for the bacteria to be dead. Water must be set to the temperature to 60 degrees Celsius or 130 degrees Fahrenheit for the effective removal of food stains and bacteria. When you set your water temperature to the above, the wash time would be around 30 minutes, which is enough to get your dishes hygienically clean.