A broken dryer vent termination door will be open to any number of animals. There could be rats, mice, bees, insects, or even the most common birds nests in vent. A birds nest could be a clog to the system and cause a drying problem. If this has happened Denver Dryer Vent can in and do our bird nest removal service and replace the old termination door with a new one that will open when drying and close when not in use. Then all that needs to be done is regular dryer vent cleaning to keep the system free from debris and allow for proper air flow.