Why South Florida grows mold better than anywhere.
Year-round humidity, an AC system doing all the drying, and CBS walls that hold water after every storm. Down here mold is not a cleaning problem, it is a building problem: what you can see on the surface is routinely the smallest part of it. Real remediation means containment, negative air, HEPA filtration, removing what is colonized, and shutting off the moisture that fed it, then proving the job is done.