Smartphone fires, Amazon suicide kits, eye-scanning phones

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Be careful who you insult on Twitter. They might retaliate like Elon Musk. Plus, why short-sightedness is growing, funny questions to ask Siri, how to control your TV with your voice, the biggest AI fails, iris-scanning tech is coming to more devices and the shocking story behind Amazon’s suicide kits. Also, don’t leave old phones lying around. They could catch fire!