porous materials mold removal
https://professionalcarpetmoldcleanup.juniperbrief.com/posts/when-to-call-for-professional-carpet-mold-cleanup
Porous materials like drywall and wood hold moisture deep inside, which makes mold removal tricky. Bleach only cleans the surface, so using a vinegar solution or a borate-based cleaner can help kill roots. After cleaning, dry the area thoroughly to prevent regrowth.