I’m probably in the minority, but I didn’t get good results with Towel Kleen.
For several years I used Detailer’s Pro Microfiber Cleaner, which worked very well. I was finally near the end of my original gallon, and discovered that the DP Cleaner was no longer available. At the same time, there were several positive reviews for 3D Towel Kleen, and it was so much less expensive than other cleaners, I decided to try it.
After several weeks of using Towel Kleen, I noticed that while the towels were clean, they no longer felt soft and didn’t absorb the rinseless solution in the bucket the way they used to. I had just enough of the old DP Cleaner to wash one batch of towels, and it restored the softness and absorbency.
I finally bought some McKee’s 37 Microfiber Cleaner, after contacting Nick, who said it's an improved version of the original Detailer’s Pro product. All I can say is that it works as well, if not better, than the Detailer’s Pro, and while more expensive than some microfiber cleaners, a gallon will last me a few years, so it’s not a big investment.
I have found that with any of the detergents it’s better to use a little less than the recommended amount, at least until you do a few loads and get an idea of how much you need. To me, a half load or full load, as stated in the directions, doesn't have much meaning, without knowing the number of towels that's supposed to represent. If you check the washer during the rinse cycle, and still see a lot of suds, you’re probably using too much.
I don’t know if the water quality in different parts of the country affects the results, and while some might be very satisfied with Towel Kleen, for me there’s no comparison and I prefer the McKee’s 37 Microfiber Cleaner.