When a console interior or cabin remains closed for any length of time, it can develop spots of mildew and mold, as well as a musty smell, due to condensation. Leaving such a space open to air it out can prove impractical because a sudden rain might leave it wetter still. Fortunately, there are simple devices to help keep boat interiors dry. For example, the Davis Air Dryr (available in two sizes, starting at about $70), the Golden Rod Dehumidifier (three sizes, starting at about $29) and West Marine’s Air Dryer with Fan (about $100) use 120-volt AC power to dry air in confined spaces. Star brite’s No Damp Ultra Dome (about $18.50) and the Marykate Moisture Control Bag (about $30) use absorbent crystals to draw moisture from the air.