I've only ever done 7 days and it's worked fine and cured to the center. The Marianski book says 10 to 14. I could swear I've usually seen 7. I think a head to head test would be interesting. I'm not doubting ya'll, I'm just wondering.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.