Your smart speakers are listening to you. Here's how to delete their recordings.

The Echo smart speaker, powered by Amazon's artificially intelligent assistant Alexa, keeps a digital ear out for its wake phrase, "Hey Alexa." When it hears these words, it starts recording the sounds that come next--your spoken commands--and then it saves these snippets in the cloud. But if it really makes you uncomfortable, then manually make the speaker stop listening when you're not using it: Tap the microphone button on the top of the device, and it will stop listening for your next "hey Alexa." To review and potentially delete the snippets that the Echo has been saving, you have to go through the Alexa app (for Android and iOS) or the Amazon website. Let's start with the former. When you open the Alexa app on your phone, the front page displays a list of saved words and phrases that you've directed at your Echo speaker.