This is a perfect chance for you to play with all those fancy knobs and dials you know nothing about on your dishwasher. There is usually a temperature setting on there, and if you turn it down, your hot water heater doesn't have to work overtime while you dishwasher is running. That way you don't have to run two appliances at once. If you hand wash, turn the hot water down - you aren't going to get out of this