Despite my skepticism, the ducts have been evacuated. No baby mice were found, only a few bobby pins. Ah, the hair-raising horror! At least, according to the poor kitties; or maybe they're upset about the complimentary smell of tiger balm.
h/t: Yoshihiko Arita, Mingzhou Chen, Ewan M. Wright, and Kishan Dholakia, "Dynamics of a levitated microparticle in vacuum trapped by a perfect vortex beam: three-dimensional motion around a complex optical potential," J. Opt. Soc. Am. B , C14-C19 (2017)