How do I clean the dryer vent from outside?
                     How to clean dryer vent from
outside?
It’s not just the lint trap that needs cleaning and maintenance;
the dryer vent also needs cleaning as this area also collects the
lint. When a dryer vent becomes clogged with lint, it loses its
efficiency to dry clothes fast, leading to a longer drying time. It
hurts  your  pocket  due  to  increased energy  bil ls,  but  it  also
increases the risk of a dangerous house fire. Therefore, it is
important  to  be  regular  with  the  schedule  of  dryer  vent
cleaning in Sacramento for your washing appliance.
Remains of lint can easily sneak their way from the dryer lint
trap sneak past to the dryer vent. 
Lint  buildup  inside  the  dryer  vent  restricts  the  airflow,
resulting in overheating. As a result, the air can become hot.
Excessive heated air can lead to dryer fire as it can ignite the
lint. 
Learning  how  to  clean  the  dryer  vent  from  the  outside
regularly can help prevent house fires. Don’t worry; it’s simple.
Here are the steps you need to take to clean the dryer 
vent from outside:
Locate the dryer vent duct:
The first step is to locate the vent. Find where your dryer vent
duct starts and ends.
Disconnect the power to your dryer:
To  clean your dryer vent, first, you need to unplug the dryer
vent to prevent any hindrance while cleaning. 
Disconnect the dryer vent duct pipe from the exhaust:
You will  find an exhaust duct on the back of the dryer that
connects to the ductwork. Pull the duct pipe from the exhaust
vent. 
If you have a dryer that operates on gas, you will have to shut
off the gas valve into the dryer. 
Now, use a lint brush to clean the lint accumulated inside the
exhaust duct point and also use a vacuum to clean it properly.
Pull the brush in and out to clean it properly. Make sure you also
use the vacuum on the outside dryer vent by removing the
duct cover on the vent outside. 
Pull the duct pipe connected to the wall ductwork:
Also,  use  the  brush  to  clean  both  the  openings  of  the
ductwork, which is inside the ductwork end and outside the
ductwork end. You need to complete the cleaning followed by
the  vacuum  used  to  ensure  all  the  lint  trapped  inside  the
ductwork comes out.
Clean the vent cover:
Wash the vent cover with soap and water. If the dirt is not in
an excessive amount, using wipes will suffice. Also, make the
gril le blockage free completely.
Inspect duct pipe:
Check  the  vent  duct  pipe  or  ductwork  for  signs  of  punctures,
bents, or damage. If it is damaged, you will need to replace it. 
According to experts, you should clean your dryer vent duct twice a
year and dryer filter after every load to reduce the risk of fires
and keep the dryer’s efficiency optimal all time.
Source: https://serviceprofessionalsnetwork.com/how-to-clean-
dryer-vent-from-outside/