I have found other products that use Enzymes. Even seventh Generation uses enzymes in thier laundry detergent. Also Hobart products is all enzyme based cleaning products and odor. Zero Odor works differantly but works very well. I have used it. If you google Enzyme cleaning prodcuts there is a Biotec manufactoring company that will build your own enzyme based cleaning product for what ever application you want.
Don't get me wrong I am all for EESO. But the technology has been out there for many years.