The answer to 'why is my dryer vent moldy' is that a moldy dryer vent is often caused by improper ventilation, lint buildup, or high humidity. Over time, moisture and lint can accumulate in the vent, creating a damp environment that promotes mold growth.
Some common symptoms of a moldy dryer vent include a musty odor, visible mold growth, and reduced airflow from the vent. This can be a health hazard and can also cause damage to your home and appliances.