The problem of a musty smell in the basement is familiar to both residents of old houses and those who live in a newly built building.
The main reasons for its appearance are dampness and humidity.
So the first thing you need to do to get rid of the musty smell is to reduce the humidity level. This can be done in a number of ways.
The principle of operation of a dehumidifier is quite simple - it collects and absorbs water from the air, and then moves it into a special container. The main thing is not to forget to empty it from time to time.
Basements typically don't have windows. Even if they do, they're often kept closed. All of this prevents sufficient air circulation, causing dampness to settle on the walls.
To avoid this, you can either open a window or install a fan in the basement.
Since mold loves to live on old cardboard boxes, discarded clothing, and other junk, be sure to go through everything in your basement and get rid of unnecessary things.
If all of the above does not give the desired result, try to neutralize the unpleasant smell with baking soda, which should be filled with plates and placed in different places in the basement.