Nest is recalling 440,000 smoke detectors due to a glitch that causes the internet-connected alarm to fail when users wave their hands at system. The Nest Protect Smoke + CO system is equipped with a silencing feature that mutes its alarm when users wave their hands near its vent, however a bug could possibly prevent the system from sounding off in a timely manner. To remedy this issue, the company is sending out a firmware update to disable the gesture control feature and notes that the smoke alarm needs to be connected to the internet in order to receive the software fix.

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