Wow, thanks for all the detailed information!
(I also will need specifics on this mat cleaner. I tried one that had essential oils but it didn't work too well.)
I think you hit the nail right on the head. We need gel yoga mats. Since they make them for the kitchen, it wouldn't be such a reach to extend the market and manufacture a different size.
Maybe I will be innovative and make my own jellies. I hear these stories about people who inject silicone caulk (Home Depot type stuff) into their body. Maybe I can do that with a deflated ball! Somehow I think it would harden and be lumpy though.