Generally unplug the dryer to start with for basic safety. Then, gently detach the duct and brush from both the equipment aspect and the outside hood. Reconnect securely, and afterwards test for solid airflow at the skin vent even though jogging the dryer on an air-only or minimal warmth location. https://www.google.com/maps/d/edit?mid=1ivrVRAiAZOS6JnCCEiaC_34ZZpQtk3E&usp=sharing