Add Yahoo as a preferred source to see more of our stories on Google. Damian Lugowski / Getty Images Even if you have your laundry routine down to a science, you might not even know that your washing ...

Dr. Elizabeth Yuko is a bioethicist and adjunct professor of ethics at Fordham University. She has written for The New York Times, The Washington Post, The Atlantic, Rolling Stone, CNN & Playboy.

Have you ever noticed gunk that builds up around your washing machine’s door? Or, perhaps you’ve discovered grains of sand accumulated inside the machine’s drum. Dirt and grime inside your washing ...