Demon's Crust

What's left over after a demon orgy covers an entire room in bodily fluids.

Most specifically the layer of these fluids that dry up and cause most cloth to become brittle and stiff, on skin it's a semitransparent glaze.

Demon1: "Dude, what happened last night? I'm covered in something crunchy..."
Demon2: "HAH! Looks like you've got a full body coat of Demon's Crust."