Dryer vent cleaning is one of the few things on this site that has a real DIY component. It also has a clear limit, and knowing where that limit sits matters — restricted dryer exhaust is a genuine fire risk.
What you can do
- Unplug the dryer. If it is gas, shut off the gas supply.
- Pull it out and disconnect the transition duct at the back.
- Clean the transition duct completely. If it is foil or plastic, replace it with rigid or semi-rigid metal.
- Vacuum the dryer's exhaust port and the area behind the machine.
- Use a rotary brush kit on the accessible portion of the wall duct.
- Go outside and clear the termination and its damper.
- Reconnect, run the dryer, and check that the exterior damper opens fully.
Where to stop
Stop if the termination is on the roof or a second storey. Stop if the run is long with multiple elbows and your brush will not reach. Stop if you find a bird nest — those are usually larger than they appear from the opening. And stop if the damper opens weakly after cleaning, because that means there is still a restriction further along.
The test that tells you if it worked
Run the dryer and check airflow at the exterior termination. Weak flow after cleaning means the restriction is in the part you could not reach. That is the point to call someone.
Why this matters more in Florida
Long runs to roof terminations are common in this region's construction, and coastal properties get nesting in terminations regularly. See our dryer vent service.
Common questions
What can I safely do myself?
The lint screen and the housing it sits in, the area behind and under the dryer, and the exterior terminal if you can reach it safely from the ground. Those three cover a meaningful share of the accumulation in a short run.
Where should I stop?
Anything needing roof access, anything inside a wall or ceiling where you cannot see what you are doing, and anything where a joint might separate. A rod pushed too hard can disconnect a duct inside a wall cavity, which turns a cleaning job into a drywall job.
Are the DIY brush kits any good?
They work on short, straight, accessible runs. On longer runs with elbows they tend to pack material tighter rather than pulling it out, and the rod sections can unscrew and be left inside the duct, which we then get called to retrieve.
Should I use a leaf blower?
We would not. It pressurises the run without any collection at the far end, so the material goes wherever the duct leaks — which, if the duct has separated inside a wall, means into the wall. There is also no way to tell whether anything actually cleared.
How do I know it worked?
Airflow at the exterior terminal while the dryer runs is the practical test. A strong, warm, visible plume means the run is clear. If it is weak after you have cleaned everything you can reach, the restriction is somewhere you cannot reach.
