A.Mac Pearce responds: Fogging is an appropriate technique for destroying an infectious agent such as anthrax spores. Once they are dead, they can’t cause disease. Mold problems, though, can’t be “fogged away,” because the mold spores are just as irritating dead or alive. While the dead mold spores cannot initiate new growth, they must be physically removed or they will remain inside the building as an irritating component of the dust. Unless the mold is rinsed or vacuumed away, it’s still there, dead or alive. It has been my experience that elbow grease trumps such chemical treatments.

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