Folex took the top spot because unlike Naturally It’s Clean Carpet Cleaner, it leave no oder and no color residue.
Folex is cheaper, too. As of today, the best price I saw so far is from Bed Bath & Beyond with their readly availble 20% off coupon. 2nd best place to look is your local independent hardware store (where I first discovered it). And when all else failed, there is always Amazon.
Both Folex and Naturally It’s Clean are made in USA and I believe they only clean, don’t disinfect.