I'm half-tempted to drill a few smaill holes in the drywall around the
nest and blast it with raid or that Sevin dust people were talking
about, but I'm not sure if that's a good idea or not, given that the
exterminator already put in some Ficam D.

I seem to recall you were "concerned about a pregnant wife" All those
pesticides in your home are not a very good idea IMO
Emilie