Why does my vent smells musty and how can I get rid of the odor?

The musty smell in your vent is likely due to mold or mildew growth. To get rid of the odor, you can try cleaning the vent with a mixture of water and vinegar, or using a commercial mold and mildew cleaner. It's also important to ensure proper ventilation and address any moisture issues in your home to prevent the odor from returning.