Let dirty dishes collect in your dishwasher and you can predict the result: a buildup of bacteria that can unleash an awful smell every time you crack the machine's door. The new Klin-Tec UV-C Stick ($31) blasts away this annoyance by automatically bathing the dishwasher's insides with germ-killing UV light once every 24 hours. Because the device ends its 12-minute run time instantly if the door of the washer opens, you can just set it in a rack and forget it — at least until you're ready to run a wash cycle. This gadget is "unfortunately not waterproof."
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