To clean a dryer vent, first unplug the dryer (and for a gas dryer, shut off the gas valve), then pull it away from the wall and disconnect the flexible duct from the back. Vacuum out the lint at both ends, then run a dryer-vent brush kit (rods that attach to a drill) through the duct to clear the full run, and clean the exterior vent flap outside. Vacuum or sweep up the debris that comes out. Do this at least once a year — lint buildup is a serious fire hazard. And clean the lint screen after every single load, which is the most important habit for preventing dryer fires. Here’s the full guide.
June 3, 2026
How to Clean a Dryer Vent Like a Pro
Why this matters: according to the National Fire Protection Association, dryers and washers are involved in an estimated 13,000-17,000 home fires a year, and the leading cause is failure to clean them — lint is highly flammable, and it builds up in the vent where the heat is. An annual vent cleaning plus cleaning the lint screen every load dramatically reduces that risk and keeps the dryer running efficiently.
Where is your dryer vent?
Not everyone knows the dryer vent setup, so here’s the lay of the land. A dryer tumbles clothes through hot air to remove moisture, and a fan pushes that hot, humid air — along with lint — out through a duct. No matter the duct type, fibers and lint collect inside, and the heat can ignite that lint if it isn’t cleared.
There are three things people conflate, and they’re different:
- The lint screen (lint trap) — the removable mesh filter inside the dryer door or on top. Clean this after every load.
- The vent duct — the flexible (often aluminum) tube running from the back of the dryer to the outside. This is the annual deep-cleaning job.
- The exterior vent flap — where the duct exits the house. Clean this too; it can clog with lint and get blocked by birds’ nests.
Gas or electric? (and a safety note)
There’s an important distinction. Gas dryers have a gas supply line connected to them and plug into a standard 120-volt household outlet. Electric dryers have no gas line and plug into a large 240-volt outlet (the big three- or four-prong kind, not a regular wall socket). The reliable way to tell: look for a gas line. If there’s a gas pipe connected, it’s gas.
The vent-cleaning steps below are the same for both, but with a gas dryer, shut off the gas valve before you start, and if you’re at all unsure about disconnecting or reconnecting anything involving the gas line, hire a professional — a disturbed gas connection is a carbon-monoxide and fire risk. When in doubt with gas, call a pro.
What you need for vent cleaning
- A drill
- A dryer-vent cleaning kit (flexible rods + brush, about $20-30)
- A vacuum
- A broom and dustpan
Step by step
- Unplug the dryer (and shut off the gas valve if it’s gas). Pull the dryer out from the wall enough to reach the back.
- Disconnect the duct. Remove the clamp or foil tape holding the flexible duct to the dryer’s exhaust outlet. Don’t yank the duct — tugging can tear it. It should release easily.
- Vacuum the openings. Vacuum the lint around and just inside the dryer’s exhaust outlet and the duct opening.
- Run the brush kit through the duct. Attach the brush to the rods and the rods to your drill. Feed it through the duct, adding rods as you go (these kits reach ~12 feet or more), letting the spinning brush sweep lint toward the exits. Pro tip: secure the rod connections with electrical tape so a section can’t unscrew and get stuck in the duct.
- Clean up the debris. Lint, dust, and sometimes small debris (clothing tags, even small stones near the exterior) will push out. Sweep and vacuum it up promptly so it doesn’t get back into the duct.
- Clean the exterior vent. Go outside to where the duct exits. Open or remove the vent flap/cover, clear any lint and check for birds’ nests, and run the brush in from that end too. If your exterior vent is on the roof or high on a wall, this is a good point to hire a professional rather than work on a ladder at height.
- Reconnect everything, reattach the duct securely (a clamp is better than foil tape), push the dryer back, and restore power (and gas).
How to clean a dryer vent without moving the dryer
Moving the dryer gives the easiest access, but you can clean from the exterior end instead — feasible when the outside vent is near the ground, much harder (and a ladder job) when it’s high up or on the roof.
Separately, don’t forget the lint screen inside the dryer — the removable mesh filter, usually in the door opening or on top. Pull it out and remove the lint after every load (just peel the lint off by hand). Every few weeks, wash the screen with a little soap and water and let it dry fully — dryer sheets leave an invisible residue on the mesh that restricts airflow over time. Cleaning the lint screen is the simplest, most important dryer-fire-prevention step there is. Note this is cleaning the lint screen, which is not the same as cleaning the vent duct itself — do both.
Frequently asked questions
What’s the best dryer vent cleaning kit?
There are many options; read reviews so you don’t get a flimsy one whose rods come apart in the duct. Well-reviewed rotary kits include the Gardus LintEater, Holikme, and various 40-foot kits for longer runs. Look for rods that lock together securely and a brush sized to your duct (usually 4 inches).
How often should you clean a dryer vent?
The vent duct: at least once a year (more often with a large household, a long duct run, or if you dry frequently). The lint screen: every single load. Signs it’s overdue include clothes taking longer than one cycle to dry, the dryer or clothes feeling very hot, a burning smell, or the exterior flap not opening fully when running.
How much does professional dryer vent cleaning cost?
For an easy-to-reach vent, a handyman or vent service often charges around $100-150; a harder, higher, or roof exterior can run closer to $300. DIY costs only the ~$30 kit. Hiring out is common and far safer than leaving the vent uncleaned, especially for roof vents or gas dryers.
What if I live in an apartment?
You can clean your own lint screen and the accessible duct behind the dryer, but the exterior vent on a multi-unit building is usually building maintenance’s responsibility — ask them to include it in their schedule.
If you hire it out, ask:
- The expected cost up front
- Whether your exterior vent is on the ground, a high wall, or the roof (affects price)
- Whether they bring their own equipment
- For a gas dryer, that they’re comfortable working around the gas connection
A once-a-year job (plus every-load lint screen)
Cleaning the dryer vent isn’t exciting, but it belongs on the annual list — it prevents fires and keeps the dryer drying efficiently (a clogged vent makes the machine work harder and wear out faster). Once you’ve pulled the dryer out and disconnected the duct, the brush kit does most of the work; vacuum up, do the exterior end, and reconnect. Hire out the parts you can’t safely reach. And above all, clean that lint screen after every load — it’s thirty seconds that meaningfully lowers your fire risk.