Using an automatic dishwasher at home is more energy-and water-efficient than washing by hand, and it's even more efficient if you run the dishwasher during nonpeak hours, which are usually after midnight or during the early morning. But instead of waking up in the middle of the night to turn on the dishwasher, check to see if yours has a "delay" feature. This allows you to fill up the dishwasher and load detergent during the day, then set the wash to start automatically whenever you want, preferably during nonpeak hours.
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ANDREWS MCMEEL SYNDICATION