I really did get absolutely filthy from my tour of the Potosí mines today. They gave us special protective clothing, which we wore over our own, and then gave back to them at the end of the tour. I had a long and thorough hot shower, when I got back to the Koala Den this afternoon. And I took all my clothes to the lavanderia this evening, for an emergency laundry wash (making a special exception to Jaza's law of washing). And even with all that, I still can't get the nauseating smell of the mines off my person, or the taste of the mines out of my mouth. Really, really filthy place.