Unplug the dryer (and turn off the gas on a gas dryer), pull it out and disconnect the hose. Clear the outside cap, then brush and vacuum the duct, clean or replace the hose, and reconnect it with clamps. Finish by running the dryer on high and checking for strong airflow outside. A short, straight wall vent takes about an hour. Roof vents and long runs are a job for a professional.
First, check that your vent is a DIY job
Most "how to" articles skip this part, and it's the one that matters most. A brush kit works well on some vents and does real damage on others.
| Your vent | DIY? |
|---|---|
| Goes straight out an outside wall, under about 10 feet | Yes |
| Wall vent, 10 to 25 feet with one or two bends | Possible, with a long enough kit and care at the bends |
| Goes up to the roof | No. Lint packs at the top and the work is on a ladder or roof. See roof vents |
| Condo or apartment vent running through the building | No. See condo and HOA programs |
| Bird nest, or no air at all at the outside cap | No. See nest removal |
Not sure where your vent ends up? Run the dryer and walk around the outside of the house to find the flap that blows warm air. If you can't find one, stop here: the vent may end in the attic or garage, which is a repair, not a cleaning.
Tools you need
- A dryer vent brush kit with flexible rods that screw together. Buy one long enough for your whole run, plus a few feet.
- A shop vacuum with a narrow crevice tool. A household vacuum works, but lint clogs it fast.
- A screwdriver or nut driver for the hose clamps.
- A cordless drill (optional) to spin the brush. Use a low speed and keep it in forward.
- Gloves, a dust mask and a flashlight.
- Foil HVAC tape for metal duct joints, if you need it. Not cloth duct tape, which dries out and falls off.
- A new hose if yours is white vinyl or thin foil. Get a 4-inch semi-rigid metal connector, 8 feet or shorter. We also do transition hose replacement.
How to clean a dryer vent in 8 steps
- Turn off the power, and the gas. Unplug the dryer. On a gas dryer, also turn the gas valve behind it a quarter turn, so the handle sits across the pipe. Move the dryer gently so you don't kink or loosen the gas line.
- Clean the lint screen and the opening it sits in. Pull the screen, then vacuum down into the slot with the crevice tool as far as it reaches. If the screen looks waxy, wash it with warm soapy water and let it dry. Dryer sheets leave a film that blocks air.
- Pull the dryer out and disconnect the hose. Loosen the clamps at the dryer and at the wall. Take a photo first if you're not sure how it goes back.
- Clear the outside cap first. Go outside, pull loose lint from the opening and wipe the flap. If there's a screen or cage over the opening, remove it: screens trap lint and aren't allowed on dryer vents. Clearing the exit first gives the lint you knock loose somewhere to go.
- Brush and vacuum the duct. Feed the brush in from the wall opening inside the house, adding rods as you go. Spin it in the direction the kit says, usually clockwise. Spinning the other way can unscrew the rods inside the duct. Work forward a few feet at a time, pull back, and vacuum the lint at the opening. Repeat until the brush comes out clean. If the duct is short and you can reach the outside end, brush from there too.
- Clean or replace the hose. Shake out and vacuum a semi-rigid metal hose. If the hose is white vinyl, thin foil, crushed, torn or longer than 8 feet, replace it.
- Reconnect it properly. Slide the hose over the dryer outlet and the wall pipe and tighten the clamps. Don't use screws, which stick into the duct and catch lint. Push the dryer back slowly, watching that the hose bends gently and doesn't get crushed against the wall.
- Turn everything back on and test. Plug the dryer in, turn the gas back on, and run it on high heat for a few minutes. Then do the airflow check below. If you smell gas, turn the valve off and call your gas company from outside.
How to tell it worked
- At the outside vent: with the dryer on high, you should feel strong, warm air and see the flap open fully. Compare it to what you felt before you started.
- The tissue test: hold a tissue near the outside opening. It should blow straight out, not flutter.
- Drying time: a normal load of towels should dry in one regular cycle again. If it still takes two, something is still blocking the air.
- Behind the dryer: after a week, check the hose isn't kinked and there's no lint around the joints.
If the air is still weak after a careful cleaning, the duct may be crushed, disconnected inside a wall, or simply too long. That's when an inspection with an airflow meter and camera earns its keep.
Mistakes that make it worse
- Using a leaf blower on a long or bent run. It moves loose lint but can pack a clog tighter into an elbow or the cap.
- Spinning the brush backward. The rods unscrew and the brush head is left inside the duct.
- Forcing the brush through a hard stop. That's usually a nest, a crushed section or a disconnected joint. Pull back and call for help.
- Screwing hose or duct joints together. The screw tips catch lint and start a new clog.
- Putting back a foil or vinyl hose. It sags, crushes and traps lint. The CPSC recommends metal duct instead.
- Shoving the dryer tight against the wall. A crushed hose undoes all the work.
Florida tips
Humid air makes lint sticky. In Pinellas County, lint clings to the duct walls rather than blowing out, so it builds up faster than in dry climates and takes more brushing to remove.
Check the cap for salt damage. Near the Gulf, metal caps rust and flaps stick. A flap that won't open slows the air, and one that won't close lets in rain, bugs and birds. See cap replacement.
Look for nests in spring. Birds build in dryer vents from March through summer. If you hear chirping or see twigs at the cap, don't push them deeper into the duct.
Time and cost
| Do it yourself | Professional | |
|---|---|---|
| Cost | A brush kit, typically $20 to $45, plus a hose if needed | From $99 for a standard vent with us |
| Time | About an hour for a short wall vent | About an hour, including testing |
| Airflow tested before and after | By feel | Measured with a meter |
| Roof vents and long runs | Not recommended | Yes |
More detail in our dryer vent cleaning cost guide and DIY vs. professional cleaning.
When to call a professional
- The vent goes to the roof, or runs a long way through the house.
- The brush hits something it can't get past.
- The air is still weak after cleaning.
- You smell burning, or the dryer or laundry room gets very hot.
- You find foil or vinyl duct inside a wall or ceiling, or a vent that ends in the attic or garage.
Want it done for you?
Same-day dryer vent service across Pinellas County. Standard cleaning from $99, airflow tested before and after, price before any extra work.
Clearwater team
1727 Coachman Plaza Dr
(727) 454-0061
Clearwater area
Largo team
13801 Walsingham Rd
(727) 662-5045
Largo area
Seminole team
7821 Seminole Blvd
(727) 855-3490
Seminole area
Questions
Can I clean my dryer vent from the outside only?
You can clear the cap and the first foot or two, but most lint sits in the duct and at the bends. Cleaning from the inside, with the hose off, reaches the whole run.
Should I use a drill with a dryer vent brush kit?
Yes, if the kit allows it. Keep the drill on low speed and in forward only. Reverse unscrews the rods inside the duct.
Can a vacuum alone clean a dryer vent?
No. A vacuum reaches the lint-trap opening and the ends of the duct. Lint stuck to the walls in the middle needs a brush.
Do I need to clean inside the dryer cabinet too?
Lint also collects inside the dryer around the drum and heater. Cleaning it means taking panels off, so it is best left to an appliance technician, with the dryer unplugged.
How often should I clean my dryer vent?
At least once a year, and every six to nine months for big households, pets, roof vents and long runs. See how often to clean a dryer vent.
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