Cascade, a P&G brand, has partnered with actor Sterling K. Brown to launch the second installment of its “Do It Every Night” initiative, revealing a “dirty little secret”: running your dishwasher every night uses less water and energy than washing dishes by hand.   According to Energy Star, certified dishwashers use less than four gallons of water per cycle compared to handwashing, which uses four gallons every two minutes. That means if you wash dishes by hand for just 10 minutes a day, ...