Yes, gun safe dehumidifier rods really do work. As the rod gently heats the air at the bottom of your safe, it creates a convection current. The circulating warm air keeps your safe above any condensation point that would lead to rusting or mildew buildup. Even without understanding the science, you can trust your fellow consumers, as the Lockdown Goldenrod dehumidifier is one of the most widely used products on the market.