What is the medical solution that he prescribed?
I know of a couple vets that are trying to get people to stop using Pam, it contain Pyrethrins, a neuro toxin that if used wrong is very toxic.
My vet recommend using a fipronil spray and treating the enclosure in the same way one would use Pam.
But my vet never recommended soaking like, and like everyone above said, that much soaking is bad news.