My understanding is that the ONLY reason for the 
suggestion to boil the water was so that the water
would be extremely hot when the CS was being made,
which decreases the surface tension of the water (it
does, this is why hot water cleans better than cold),
which SUPPOSEDLY enable you to make a higher
concentration of CS in the same amount of tim. It has
been likened to increasing the electrical conductivity
by adding a pinch of saline solution or mineral water
to the distilled.

I am not claiming this as being true, just trying to
clear the air...I have seen a few people appear to get
very excited and adamant about NOT boiling the water,
as if there were something sinister or dangerous about
it.

--

Charles Marcus