As far as house washing goes,..Gain or Dawn will clean just as well as any of these "purpose made" soaps. I've used several buckets of elemonator and it works well,...just not any better than regular ole' dish soap. I was reading about the Gain "discovered" by Chris Tucker, and I tried it,..I was sold. And from what I understand, it works very well in a roof mix,..so don't fall for these "other" products' claim as being so much better,...when Gain is way cheaper and available locally. Try them all and you will see. Most of this is just hype to promote sales to the new fellas.
*TSP doesn't have any soapy qualities,.but is still the best thing to add to a roof mix. Roof snot provides more cling,..but doesn't have the same power as TSP.Roof Snot mixes easier though, and is good enough,...Point being,..the cling thing isn't as important as some make out,..do roofs at the right time of day,..and learn how to lay down your mix,..and you'll be fine with a less soapy mix.
Jeff