The answer to 'why is my dryer vent dirty' is that lint and debris can build up in the dryer vent over time, causing it to become clogged and dirty. This is a common issue that can happen with regular dryer use, and it's important to clean the vent regularly to maintain proper airflow and prevent fire hazards.
Some common causes of a dirty dryer vent include lint buildup, debris from the outdoors getting into the vent, and issues with the vent itself, such as kinks or damage. Symptoms of a dirty vent include longer drying times, the dryer getting hotter than usual, and visible lint or debris coming out of the vent. To address this, you can try cleaning the vent yourself, but for more extensive blockages or damage, it's best to call a professional cleaning service to ensure the vent is thoroughly cleaned and any underlying issues are addressed.