Wear gloves, an N95 mask, and eye protection
Ventilate the area
Fix any water leak or moisture source
Remove and discard porous moldy materials
Scrub hard surfaces with soap and water
Apply a mold-killing cleaner or diluted bleach solution on non-porous surfaces
Let the surface stay wet for the recommended contact time
Rinse and dry the area completely
Use a dehumidifier to keep humidity low
Clean or replace HVAC filters
Seal and repaint only after the area is fully dry
Call a professional for large, hidden, or toxic mold growth