What is the rule for objects vanishing with vampires anyway?
Now as you got me thinking about it, I wonder how no one in buffyverse ever made a business out of it.
Not even Initiative. Because, damn, the way you could use a vamp to dispose any kind of hazardous waste?
Or to dispose the bodies.
Or you could use vamps for making hole in any surface.

If you think about it, dusted vamps defy the first law of thermodynamics, how the Initiative scientists never noticed that?!