My house is not the top floor, but the walls are moldy and hairy. Should the property be managed?

The walls are moldy, and some doors and windows are often open. Rain floats on the wall and will get moldy when it gets wet. In this case, the property will not care. If there is water leakage upstairs, you can find a property management. Moldy walls can be removed by spraying mildew remover on the walls. Add anti-mildew agent to the wall paint, and then brush it on the wall, so it won't get moldy.