This is a great question. Generally speaking, you only want to deep clean your yoga mat when you feel it has been exposed to germs. If you are practicing at home and no one in your home is sick, you really don’t need to deep clean your mat very often. Having said that, given the current asymptomatic spread of COVID-19, thoroughly cleaning your mat once a week is probably a good idea. If you are venturing back out into studios, you should deep clean your mat (both front and back) after your class. Use Manduka's Botanical Disinfecting Cleaner to thoroughly clean.
For further guidance, check out our Mat Care Guide.