To fix basement humidity problems, use a dehumidifier to reduce moisture levels. Improve ventilation by installing vents or an exhaust fan, and address any leaks or water sources. Consider insulating walls and floors to reduce condensation.

Use a dehumidifier, improve ventilation with vents or an exhaust fan, and address leaks or water sources. Insulating walls and floors helps reduce condensation. These measures effectively control humidity and prevent related issues.