There will be guys who cant use Xtreme brushes, clean without additives, clean without hot or a flat out flow and they will all argue its their way or no way, not one of them will have evidence proving their cleaning is any better than the guy using the Xtreme
brush and cold.
Don't get me wrong I'm sure there will be guys ( on the coast is one example) who may benefit from hot but to the majority of
users it will be nothing more than a placebo.