Ok so the technique used maybe slightly different to anything you guys use and I will cover it completely in a separate thread.
Once all the butane has been blasted through the cannon and is being contained this is the point you want to remove the residues (see below )
This is was sat for a couple of minutes unroll the gasses all settle down and become almost still (no heat or water to be added prior) you will at this point see the residues start to build
Simply take a sterile and clean small teaspoon and start to gently stir the gasses, stir for about 20 seconds gently and you will notice the residues will start binding together at the bottom in a clump with a few minuscule dots just under the surface once you notice these have formed you simply spoon them out starting with the main lump at the bottom, I say lump but we’re talking no bigger than a grain of rice. Remove any tiny traces that make the surface and stir again (repeat process maybe once more) then you will see the residues have in fact all been removed! Now you can start adding a touch of heat and start the boil of process by slowly adding luke warm tap water to your res (see below)
And there you have it a little resolution
Give it a try
ATB
Smokes
I’ll throw up a thread of the process 
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