MOTM

My brother is in the aquarium maintenance business and I always use 
the water he has in a holding drum. I know it passes through a RO 
filter and some other stuff, so it is super pure.  I don't think it 
really matters that much as long as you thoroughly dry of the PCB, 
but the tap water at my location tastes noticeably .. different.

> > One suggestion - if you plan to go back over the boards to solder 
the vias
> > AFTER all of the other components have been soldered, use no-
clean solder.
> > Using organic solder would require you to wash the board again, 
and some
> > parts would not respond well to that (such as pots).  Especially 
if you
> wash
> > in tap water and not distilled, as that can leave a mineral 
residue.
> >
> > Actually I'm curious, does anyone else do a once over on their 
boards with
> > distilled water, after scrubbing under the tap?