They can be burned with holy water I think. At Bianca's party, didn't Susan throw the jar of holy water at the light or something, and cook them with the holy steam?
Ah...I think I remember that now, too. I'll look into that! Thanks!
On the other hand, if I really screw it up, all the other nerds and geeks will make fun of me--which, if you think about it is the height of ultimate compliment for a nerd & geek to be the object of ridicule by nerds & geeks...the supreme peak of nerdom & geekdom...so I guess I shouldn't worry