Listerine probably poisons the mites with natural essential oils, same as it does vs. bacteria.
Did you know it was invented to sterilize surgical instruments, and was only marketed as mouthwash later on?
The only cure for that is hours of television radiation. And this tiny ad:
177 hours of video: the 2017 Permaculture Design Course and Appropriate Technology Coursehttps://permies.com/wiki/65386/hours-video-Permaculture-Design-Technology