$300 smart toothbrush does all your teeth at once

Kyle Barr reports that the $300 Feno smart toothbrush is 'the worst thing I've ever shoved in my mouth.' The gob-filling mouthpiece cleans every one of your chompers simultaneously. He says it works, but he didn't like the experience one bit: it 'made my entire head shake like a marionette piloted by a mad puppeteer.' — Read the rest
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