After months of revelations and apologies, all the major smart assistant makers have revamped how they handle human review of audio snippets.

Amazon Alexa, Google Assistant, Apple Siri, and Microsoft Cortana were all using third-party contractors to transcribe and vet recorded snippets, adding some human brain power to underlying machine-learning algorithms.

But the backlash over the lack of transparency spurred new customer controls.

Even if Siri isn't your smart assistant of choice, it's still a good time to take stock of how you have things set up on whatever platform you use.

Each service has its own mix of options and controls.

Here's how to take the human element out of Siri, Alexa, Google Assistant, and Cortana.

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