Use a dehumidifier
Run air conditioning
Ventilate bathrooms and kitchens
Use exhaust fans while cooking and showering
Fix leaks and water intrusion
Dry wet clothes outdoors or with a vented dryer
Keep windows closed on humid days
Open windows when outdoor air is drier
Improve attic, crawl space, and basement ventilation
Seal gaps around doors, windows, and pipes
Insulate cold surfaces to reduce condensation
Clean and maintain HVAC systems
Replace or clean air filters regularly
Avoid overwatering indoor plants
Reduce indoor moisture sources
Cover pots while cooking
Wipe down wet surfaces
Use moisture absorbers in small spaces
Keep indoor humidity between 30% and 50%