[Muffet grimaces, and shakes her head.]

Would that I knew. We're lucky, in that it doesn't seem inclined to leave one particular, avoidable area... but I don't like the idea of having to just hope that luck holds out.

From deeply frustrating experience, I can at least tell you that many things do not seem particularly effective against it. Including, but sadly probably not limited to, fire, sharp objects, blunt objects, and strangulation.