A silver hooded exhaust vent cap mounted on gray vinyl lap siding on the exterior wall of a house.

Dryer Vent Cleaning in Jackson, TN

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Step 1 of 3: Equipment
A white hooded exhaust vent with louvers mounted on a gray lap-sided exterior house wall.

Cold vents make lint stick

Your dryer pushes out warm, damp air every time it runs. Once that air hits the cold metal of the vent, it cools fast, and the moisture in it settles on the walls of the duct. Lint sticks to a damp surface much easier than a dry one, so the buildup packs in tighter and holds on.

On winter nights averaging 32°F from December through February, that cooling happens fast, especially in the stretch of vent closest to the outside wall. A vent that is narrowing with lint gives the moist air less room to escape, and it lingers longer against those cold walls instead of clearing out.

32°F
the average winter night, and cold vents catch damp lint
7 months
October through April, the vent stays cold
Isometric line illustration of a front-loading dryer connected by a flexible duct to a hooded vent on a wall panel.
Your vent runs coldest from November through March.

NOAA nClimDiv, 1991–2020 normals

How often should a dryer vent be cleaned?
Once a year is the general rule for most households. Lint builds up along the whole length of the vent, not just in the trap, and it narrows the path the hot air needs to escape. A vent that runs long or has several bends clogs faster than a short, straight one, so those setups may need a look sooner.
Can I clean my dryer vent myself?
You can clean the lint trap and the first few feet of duct yourself, but that is not the same as cleaning the whole vent. Most runs go through a wall or up through a roof, with bends you cannot reach or see into from either end. A brush kit handles the easy part. The lint sitting further down, where most clogs actually form, needs a rod system or a vacuum built for the job.
What are the signs of a clogged dryer vent?
Clothes that take longer than one cycle to dry, or come out hot instead of just warm, are the first sign. The dryer itself may feel hot to the touch on the outside, and you might smell something faintly burnt during a load. Check the outside vent hood while the dryer runs. If you feel little or no airflow coming out, the duct is blocked somewhere between there and the machine.