How Often Should You Clean Your Dryer Vent?

Most households should clean the dryer vent duct at least once a year, and more often if you run a lot of laundry, have pets or have a long vent run. The lint screen inside the dryer should be cleaned after every single load. A clogged vent makes your dryer work harder, lengthens drying times and raises the risk of a dryer fire, since lint is highly flammable. Longer drying times and a hot laundry room are common signs it is overdue.

Dryer vent cleaning is one of those chores that is easy to forget because the duct is mostly hidden. Here is how to know when to do it and how to get it done.

Why dryer vents get clogged

Every load of laundry sheds lint. The lint screen catches much of it, but not all. Fine fibers pass through and collect inside the dryer, the flexible hose behind it and the duct leading outdoors.

Over time, lint builds up along the walls of the duct, especially at bends and joints. Moisture from wet clothes can make lint stick and clump. Birds, rodents or insects may also nest in the outside vent opening.

Why it matters

Fire safety

Lint is extremely flammable, and dryers generate a lot of heat. When airflow is restricted, heat builds up inside the dryer and duct, which increases the risk of fire. Clogged vents are a well-known cause of household dryer fires.

Efficiency

A blocked vent traps hot, moist air. Clothes take longer to dry, so the dryer runs longer and uses more energy.

Wear on the dryer

Running hot for long cycles puts extra strain on heating elements, thermostats and other parts, which may shorten the dryer’s life.

Carbon monoxide

For gas dryers, a blocked vent can prevent combustion gases from venting outdoors properly. Make sure you have working carbon monoxide detectors in your home.

How often to clean

After every load

Clean the lint screen each time you use the dryer. It takes seconds and helps more than many people realize.

Every few months

Wash the lint screen with warm, soapy water and a soft brush. Dryer sheets and fabric softener can leave a film that blocks airflow even when the screen looks clean. Let it dry fully before putting it back.

At least once a year

Clean the full vent duct from the dryer to the outside. Consider doing it more often if:

• You do several loads a day, such as in a large family.
• You have pets that shed heavily.
• Your vent run is long or has several bends.
• The vent exits through the roof, where lint can collect more easily.
• You dry bulky items like towels and bedding frequently.

Signs your dryer vent needs cleaning

• Clothes take longer to dry or need more than one cycle.
• The dryer or laundry room feels unusually hot.
• Clothes feel very hot at the end of a cycle.
• A burning smell when the dryer is running.
• Lint around the outside vent flap, or the flap barely opens while the dryer runs.
• Visible lint behind or around the dryer.
• It has been more than a year since the last cleaning.

If you notice a burning smell, stop using the dryer until it has been checked.

How to clean a dryer vent yourself

You will need a dryer vent cleaning brush kit, a vacuum with a hose attachment, a screwdriver and possibly foil tape or clamps.

1. Unplug the dryer. For a gas dryer, also turn off the gas supply valve.
2. Pull the dryer away from the wall carefully, without kinking the gas line or damaging the vent hose.
3. Disconnect the vent hose from the back of the dryer and the wall duct. Loosen the clamps or remove the tape.
4. Vacuum out the dryer’s exhaust opening and the area behind the dryer.
5. Clean the duct by feeding a vent brush into it and rotating it as you push forward. Pull out lint as you go. Work from both the inside and the outside opening if possible.
6. Clean the outside vent cover. Remove lint, debris and any nests, and make sure the flap opens and closes freely.
7. Check the hose. If it is crushed, torn or made of thin plastic or foil, consider replacing it with a rigid or semi-rigid metal duct, which is generally recommended for safety.
8. Reconnect everything securely, push the dryer back without crushing the hose, and restore power and gas.
9. Run the dryer for a few minutes and check that air flows strongly from the outside vent.

When to hire a professional

Consider a professional dryer vent cleaning service if:

• The vent run is long, goes through the roof or has many turns.
• You cannot reach the outside vent safely.
• You find a lot of lint packed deep inside the duct.
• You suspect damage to the ductwork.
• You are uncomfortable moving a gas dryer.

A professional typically uses specialized brushes and air tools to clean the entire run and can inspect the ductwork.

Habits that keep vents clearer

• Clean the lint screen after every load.
• Do not overload the dryer, which restricts airflow.
• Use dryer sheets and fabric softener sparingly, or wash the screen regularly.
• Keep the area around the dryer clean and free of clutter.
• Check the outside vent every few months.
• Never run the dryer when you are leaving the house or going to sleep, as an extra safety habit.

The bottom line

Clean your lint screen after every load, wash it every few months and clean the full dryer vent at least once a year, or more often in busy households. Watch for longer drying times and excess heat as warning signs. A little routine attention makes your dryer safer, more efficient and longer-lasting.