To check your dryer vent, disconnect the dryer from the wall and vent hose. Use a flashlight to inspect the vent hose for any tears or blockages. Clean any lint from the vent hose and dryer lint trap. Reconnect the dryer and run it for a few minutes. Use a smoke bomb to test the airflow by placing it in the vent hose and looking for any smoke escaping around the vent pipe or outside the home.