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De-ionized water from a chem lab is good stuff.
In some ways it is better than distilled water.

One caution ... some labs have serious nasty stuff
on the benches and nothing should not be taken...

Without knowing all that is going on the quickest diagnostic tool
is a jug of distilled water (often used for ironing clothes).

If you can build a great lather with distilled water then half
a...