Remove the source of the smell if you can, and if it’s something more complex like black damp or a leak, ask a specialist for help. Open up all windows and doors to let the fresh air in – Provided it’s not too cold out and it’s safe to do, this is the first and easiest step you can take to air out your house.ow to Get Rid of a Musty Smell in the Home. A musty smell can have several different causes, but it can make your home feel less welcoming and even a bit unpleasant. This article will describe ways to deal with a musty smell in the bedroom or in other parts of your home.