How Often Should You Clean a Dryer Vent?
Once a year for most homes. More often if you have a large household, pets that shed, or a long vent run — every six months in those cases.
That's the short answer. The longer one is that most people have never had it done at all, and don't realize their dryer is the reason their laundry takes twice as long as it used to.
How to tell if yours is overdue
You don't need anyone to inspect it. Go outside, find where the vent exits your house, and run the dryer.
The flap should open. You should feel steady, warm air coming out. If the flap barely moves, stays shut, or lint is packed around the opening, your vent is blocked.
That check takes thirty seconds and it's the most reliable test there is.
The signs from inside
Clothes take more than one cycle to dry. This is the clearest sign, and the one most people put up with for months before doing anything.
The dryer or the clothes feel unusually hot at the end of a cycle. Heat that can't escape through the vent stays in the drum.
The laundry room feels humid, or smells musty when the dryer runs. That moisture should be leaving the house.
The dryer shuts off partway through a cycle. Some models have a safety cutoff that trips when airflow is restricted.
Why it matters beyond the inconvenience
Dryer lint is extremely flammable, and a blocked vent traps it against a heat source. Clothes dryers are a recognized cause of house fires, and blocked vents are the most common reason.
There's also the wear. A dryer fighting restricted airflow runs hotter and longer than it was designed to, which kills heating elements and thermal fuses early. We replace plenty of both, and the vent is often the real cause — fixing the element without clearing the vent just means replacing it again.
And the running cost. A dryer that needs two cycles is using twice the power to do the same job.
What affects how often you need it
Household size. More laundry means more lint.
Pets. Pet hair ends up in the lint trap and the vent.
Vent length and routing. A dryer against an outside wall with a short straight run stays clearer than one in the middle of the house venting up through the roof. Long runs and multiple bends collect lint faster.
The type of dryer. Some vent more efficiently than others.
Can you do it yourself?
Partly. You can clear the section you can reach from behind the dryer, and you should clean the lint trap after every load.
What's harder is the full length of the duct, particularly on a long or roof-vented run — which is exactly where the worst buildup sits. If you've cleaned what you can reach and the clothes still take two cycles, the blockage is further along.
If you need it done
We clean dryer vents across Salt Lake, Davis and Utah Counties, from Bountiful to Lehi. We clear the full length of the duct rather than just the reachable section, check the outside flap works properly, and confirm airflow before we leave.