I agree Ralph,..that's why I use at least some percentage when cleaning concrete. I don't know what Dragon Juice is,..and not even sure what it's primary use is,..but cleaning residential concrete isn't a great science either way, as mentioned many times by many contractors,..simply DS'ing the same mix used for houses will soften up mold and dirt enough that you can run a surface cleaner over it with one pass and it will be clean. Seems there's always something "new and improved" that makes our work easier,..but I think most products these days are just variations of other products,..consisting of the same detergents.
With respect to Doug and Ron,..those pictures are the "same" pictures we've seen for the last umpteen years when someone shows examples of concrete cleaning,..nothing new there.
*I like trying new ideas and thinking above and beyond where we're at with equipment and products,..but I personally feel that I've reached a saturation point of improvements that makes "A World of Difference"
I mean,..we fly through house washing, deck cleaning, concrete cleaning and roof cleaning,..I'm not sure what else can be done to make it that much easier.
**With that said, I did kind of accidentally,. or out of "desperation" come upon a good cold weather gutter cleaner for those tough days in early Spring and late Fall. But it isn't a complete game changer, in that it won't replace my primary gutter cleaner. So, yea,..I do believe improvements can and will be made made,..but in small increments. And because the work seems so routine these days,..I am always paying attention to how we do things and try to improve on it,..but sometimes those ideas aren't an improvement,..just seemed good at the time,Ha,Ha,..
Jeff