Use a dehumidifier
Run air conditioning
Ventilate bathrooms and kitchens
Use exhaust fans while cooking and showering
Fix leaks and plumbing issues
Dry clothes outdoors or with a vented dryer
Keep windows closed on humid days
Seal gaps around doors and windows
Improve attic and crawlspace ventilation
Clean or replace HVAC filters regularly
Reduce indoor plants
Avoid boiling water for long periods
Cover pots while cooking
Store firewood outside
Use moisture absorbers in small spaces
Insulate cold surfaces to prevent condensation
Check and clean gutters and downspouts
Remove standing water indoors
Open interior doors to improve airflow
Maintain proper home drainage