Stuart,
I'm not being a 'know it all,' as you put it, I was merely pointing out that to get heat you need flow and flow uses water, if you are getting heat more quickly with the Shear Dry then you have to be using flow as there is no other way for it to reach the tool.
I try every new tool that comes on the market, but through them all I can't honestly say that one 'cleans' better than another, because they are merely flushing out pre-loosened soil. Some are very much easier and lighter to use, like the Saphhire and doubtless the Shear Dry, which when they fix the spitting glitch I will be purchasing myself. In my opinion, which is all I am expressing, 'cleans better' sometimes gets confused with 'cleans easier.'
Simon