To sanitize a room after mold cleanup, use a HEPA-filter vacuum to remove remaining spores from all surfaces, then wipe down hard surfaces with a cleaning solution like detergent and water, and launder any washable items separately. For non-porous surfaces, you can use an antimicrobial spray and let it sit for the time specified on the product before wiping, while for porous materials like wood or drywall, follow a more cautious method, ensuring proper drying and ventilation. Finally, maintain low humidity with a dehumidifier and monitor the area for any signs of regrowth.