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Samsung's SilverCare Washer WF316LAW ($1,200; www .samsung.com) promised lower water and energy use and less wear on clothes when it made its debut earlier this year. But the intriguing feature on this front-loader is its SilverCare setting, which the maker claims will sanitize your wash by releasing a trace amount of silver from two small bars into the water during washing. The setting is designed to remove or kill 99.9 percent of "tested bacteria" with cold water but without chlorine bleach. The washer is part of a wave of products inspired by nanotechnology, which involves engineering materials at the molecular level. (A nanometer is a billionth of a meter.)
How we tested. We washed T-shirts 10 times using the SilverCare setting, drying the shirts between each wash. Next, we cut the shirts in half and sewed them together with halves ...