The basement is covered with all the mats I lug around to classes, to the domestic violence shelters, etc, for a thorough rub down and air out. A couple of people have asked about mat cleanliness, whether or not gym mats/studio mats are cleaned (theoretically, yes, realistically, not so much), so it seems appropriate to share this recipe with you. It's green, it'll last you a long time, and if you get a small spray bottle to tuck in your bag you can spray it right after practice, let it dry for five minutes while you gather your things. Trust me, it adds to the joy of spreading out the mat each day if it smells clean. And more: people have asked to borrow it when I go to studios, it smells that good.
I don't measure anything. But I'm guessing it's about like this:
1 cup water
1/4 cup witch hazel
10 drops tea tree oil
15 drops lavender oil (or other smelly one you like, or skip)
5 or 6 drops eucalyptus oil.
You can add rubbing alcohol, if you like. But witch hazel, tea tree, and eucalyptus are all antispetic in addition to being good things for you to breathe.