Grade school level fix: I place a box fan outside the shower, but oriented to circulate air inside my shower stall, turn it on every time I exit the shower, leave it on 8 hrs. Result: Dries out the entire stall, zero mold growth now for several years, no need to use harsh, caustic cleaners either.

https://archive.ph/ee0nF

It's weird that it mentions ventilation. Doesn't the state or the insurance company have minimum standards you need to live up to?