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5. Dishwasher

Loading up the dishwasher may be more efficient than hand-scrubbing stuck-on remains of last night's mac-n-cheese, but it comes with a convenience fee. Dishwasher use represents 2% of your annual energy bill, or roughly $47, according to the Department of Energy.

Cut Your Bill: Let dishes air dry instead of using the drying feature -- which doubles the appliance's power draw, recommends Kweller. That simple move could reduce your bill by $20.
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