Back when I had to swap out a mixer valve I had the worst time trying to get everything off until someone suggested soaking it all with some vinegar in a spray bottle. Everything came apart much easier after a few minutes!

I second this recommendation, Mignola is an amazing artist and I enjoyed both this and the Doom That Came to Gotham.

Manly Guys had a great comic about that particular spirit.

The only animal in the US with a pocket and they shove the coins down its throat? Oof.