fix musty basement 3

https://extra-wiki.win/index.php/What_You_Need_to_Know_About_Mold_After_Flooding

To fix a musty basement, start by identifying the source of moisture, like leaks or poor ventilation. Clean walls and floors with a mixture of bleach and water to kill mold, then use a dehumidifier to keep humidity below 50 percent. Seal cracks in the foundation and consider installing a sump pump if water pooling is an issue.