[...Welp, that's creepy. Muffet cheerfully ignores this, on the grounds that if he tries to stab her to death it's not going to help if she panics, and if he doesn't then there's no sense wasting time worrying. She's just going to burn that bridge when she comes to it.]

Right, there's always cooking. I wonder if any of these broken bits are shiny enough to be reflective? I've never had much of a talent for fire magic, but I've heard you can burn wood by reflecting sunlight to get it hot enough...