Purified water for sale!
[Directions to Nyarlathotep's workshop here.]
Managed to get Nylarthotep's water machine refined by throwing sandwiches in and tasting the output. Using monsters was too risky. The sludge smelled toxic. Eventually I came across a stray cat near the junkyard.
The cat-water had a metallic taste to it at first. Some tweaking solved that. But as monsters are more numerous, I decided I really ought to calibrate the machine to them. I threw one in, went by scent, tampering with the settings until I could smell nothing...
But I'm still leery about actually drinking it.
I'll see how customers handle it first.