You know the smell.
It's the faint earthy smell that greets you when you walk into the basement after heavy rain or the musty smell that lingers in dusty rooms. No matter how regularly you mop, it seems owners now grow up and find it a piece to get used to. Others try to cover it up with scented candles, air fresheners, or open house windows, hoping that the crisp air will make it disappear.
Unfortunately, a damp smell is never just unpleasant air.