This question might be simple if I had a print copy, but I enjoy my Dresden Files on Audible, so I'm going off what it sounds like.
In Skin Game, there's a scene where Michael puts his hand on Harry's head and yells something that sounds to me like "Lavaquo de sodium!" in order to cast out some critters who are attacking Harry (hopefully that's not a spoiler; there are always critters attacking Harry).
Anyway, my Latin is even worse than Harry's and I don't have the spelling to hit up Google. Anyone know what that phrase actually is and means? If I'm guessing, it's something about washing the salt. :)