Wear gloves, goggles, and an N95 or better respirator
Ventilate the area by opening windows and using fans
Stop the moisture source causing the mold
Remove and discard porous materials with heavy mold growth
Scrub hard surfaces with soap and water
Use a mold-killing cleaner on non-porous surfaces
Dry the area completely after cleaning
Clean nearby items and surfaces to prevent spread
Seal and dispose of contaminated debris in bags
Wash clothing and tools used during cleanup
Replace damaged drywall, insulation, or carpeting if needed
Call a professional for large areas or severe contamination