On today's episode, how to defoam your root beer and how to insult someone, medieval-style. Plus, one listener has a question about British cows, and Sir Patrick Stewart offers his services.

You can email your burning questions to howto@npr.org.

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How To Do Everything is hosted by Mike Danforth and Ian Chillag. It is produced by Heena Srivastava. Technical direction from Lorna White.

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