Appliances Dishwashers: Using the dishwasher once daily uses less electricity and water than washing dishes three times a day. Use your dishwasher after 8 p.m. when electricity demand is less. Run the dishwasher only when full. Use the air-dry setting or leave the door open to naturally dry dishes. When buying a new dishwasher look for: ENERGY STAR label Short-cycle or econowash features More There's no need to pre-rinse your dishes in the sink before placing them in the dishwasher. Help the dishwasher work efficiently by regularly cleaning drains and filters.