[angiosperm]

To be fair, the water used for dilution has orders of magnitude more of stuff already dissolved in it, if only from the person breathing on it.

[dylan604]

Surely, you're not implying that someone making a snake oil would be doing so in a non-sterile environment without any kind good manufacturing practices being used. These things seem so trust worthy. I mean, even the government feels they need no regulations because they do it so well themselves.

[angiosperm]

To be fair, most probably don't actually bother with the original solute, and instead sell straight-up distilled water. Or just tap water.