Hi! Here are the FAQs on the Manduka Website. I can’t post it here but go to Manduka, click on Customer Service and then the FAQs. They do say that it takes time to “break in” your mat and you’re not the only one slipping on the mat. There’s a section about slipping on the mat that tells you:
“There is a break-in period that everyone, including those who are on our mats, has to go through before the thin film wears off and the slipping is almost completely eliminated. Typically, it takes about three months of daily practice and a “little” bit of slipping during that time so that the friction of feet and hands wears on the mat.”
Hope that helps…
Lakshmi