Want better video quality? Sign in to access HD streaming!


Want to watch better-quality PBS Video? Sign in to access HD streaming!

When you sign in, you'll become a PBS Insider and we'll share your contact information with your local PBS station. You may receive updates to help you stay connected with what's happening online and in your community. Privacy Policy


Should You Wash Your Hands?

  • Aired: 05/10/2017
  • 04:40
  • Rating: NR
Gross Science explores hand hygiene, with some help from the show Clean My Space.
Embed Options
Close ×
Should You Wash Your Hands?
Should You Wash Your Hands?
What do we really mean when we say that we’re clean?
Please copy this text to your clipboard.
Problems Playing Video ?
Funding for NOVA is provided by David H. Koch, the Corporation for Public Broadcasting and PBS viewers.
PBS Anywhere - funder area
Related Links:


Watch videos from your favorite PBS KIDS shows with the PBS KIDS Video app for your tablet or phone.

Downton Abbey Collection

Bring home the complete collection: DVDs, Blu-rays, books, gifts and more. Visit ShopPBS.


WKNO/Channel 10 helps all of us explore new worlds and ideas. Give Now