The U.S. Fire Administration attributes roughly 2,900 residential fires a year to clothes dryers, and failure to clean them is the leading cause. Lint is extremely flammable, and it accumulates in the one place you can’t inspect: the duct run between the dryer and the outside wall.
1. Clothes take more than one cycle
This is the single most reliable sign. If a normal load needs two cycles, airflow is restricted somewhere in the line. It’s also the one people put up with longest, because it creeps up gradually.
2. The dryer or the room is hot to the touch
Heat that can’t escape through the vent stays in the machine and the laundry room. A dryer that’s uncomfortably hot on the outside is working against a blockage.
3. A burning smell
Stop using the dryer and call someone. This one is not a maintenance item — it’s urgent.
4. Lint around the door seal
If lint is collecting at the door rather than being carried out of the vent, air is backing up instead of exiting.
5. No airflow at the exterior vent
Go outside while the dryer runs and put your hand near the vent hood. You should feel strong, warm air. Weak or no airflow means the line is packed — often at the hood itself, where the damper sticks shut.Rather than counting years, look for the signs:
6. It's been more than a year
Annual is the standard for a typical household. Every six months if you run more than five loads a week, have pets that shed, or your vent terminates through the roof.
Why Atlanta homes are worse than average
A lot of Metro Atlanta housing puts the laundry room upstairs, which means the vent runs up through a wall, across an attic, and out through the roof. The longer and more angled the run, the faster it packs. Second-floor laundries are consistently the worst blockages we find, and they’re common in Brookhaven townhomes and newer Smyrna subdivisions.
Why a store-bought kit usually isn't enough
The brush kits sold at hardware stores clear the first few feet. That’s rarely where the blockage is — it’s normally at an elbow or the exterior hood. A proper dryer vent cleaning runs a rotary brush through the entire length while a vacuum extracts at the source, so the lint ends up in the machine rather than on your laundry room floor.
While we’re there we also check the transition hose. Crushed foil or plastic hose behind the dryer is a fire hazard in its own right, and we’ll replace it with rigid or semi-rigid metal.
How long should the vent run actually be?
Manufacturers generally specify a maximum developed length, and every 90-degree elbow subtracts meaningfully from the allowance. A lot of Metro Atlanta homes exceed it — particularly second-floor laundries where the line runs up a wall, across an attic and out the roof. If your run is long, you’re not doing anything wrong by cleaning it twice a year rather than once.
The transition hose behind the dryer
This is the piece people forget. If yours is the white plastic or thin foil accordion type, replace it. Both crush easily when the dryer is pushed back against the wall, both trap lint in their ridges, and both are flammable. Rigid or semi-rigid metal is the answer, and we swap them as part of the job when we find them.
What a proper cleaning actually involves
Birds, and why the exterior hood matters
An exterior vent with a broken or missing damper is an open invitation. We pull bird nests out of dryer vents regularly, usually in spring, and a nest is a total blockage rather than a partial one. If your damper doesn’t move freely, that’s the fix that prevents next year’s problem.
Condos, apartments and multi-family
Shared-riser buildings are the highest-risk case, because one packed line is a fire risk to every unit connected to it. If you manage a building, a unit-by-unit programme is one of the highest-value things you can do — see our
commercial services.
If your clothes are taking two cycles, that's your sign. It's a 45–90 minute job and it's the cheapest fire prevention in your house.
