The Vampires Nest
"I think it works like acid on a human. I guess a raincoat might keep it off them, but anything that soaks up the water is going to be quite nasty for them. But you might have a point. If we're just making the floor wet, then unless they've got holes in their shoes, they won't be hurt."
She considered for a moment.
"We can check out the tower. If they're using a ladder, then a good swabbing should make it untouchable. If it's stair, I guess the plan won't work. Unless you can think of something?"