Cleaning your dryer’s lint trap probably feels routine by now — but there’s a second, less visible part of the system that gets overlooked far more often: the dryer vent. Left unchecked, a clogged dryer vent doesn’t just make your clothes take longer to dry. According to fire safety data, dryers and washing machines are involved in thousands of home fires every year in the U.S., and a blocked exhaust vent is one of the leading contributing factors. Here’s why it matters and exactly how to clean it.
Why Dryer Vents Get Clogged
Even with a clean lint trap, not all lint gets captured. Fine particles pass through the trap’s mesh and travel down the exhaust duct every time you dry a load. Over months and years, this lint builds up along the walls of the vent, especially at bends, joints, and anywhere airflow slows down. The longer the vent run — and the more bends it has — the more likely lint is to accumulate before reaching the outside exhaust.
Warning Signs Your Dryer Vent Needs Cleaning
You don’t need to guess — there are clear signs that point to a blocked vent:
- Clothes take noticeably longer to dry than they used to, even on normal settings
- The dryer feels hotter than usual to the touch on the outside, or the laundry room feels warmer during a cycle
- A burning smell during operation
- The lint trap fills up unusually fast, or you notice lint accumulating around the dryer itself
- The exterior vent flap doesn’t open properly or barely moves when the dryer is running
- It’s been over a year since the vent was last cleaned (a general rule of thumb for most households)
How to Clean a Dryer Vent Yourself
What You’ll Need
- A dryer vent cleaning brush kit (flexible rods with a brush attachment) or a long, flexible brush
- A vacuum with a hose attachment
- A screwdriver (for disconnecting the vent duct)
Step-by-Step Process
- Unplug the dryer (or shut off the gas supply for gas dryers) before doing anything else
- Pull the dryer away from the wall to access the vent connection at the back
- Disconnect the exhaust duct from the back of the dryer, usually secured with a clamp or screws
- Vacuum out visible lint from both the dryer’s exhaust port and the duct opening
- Insert the brush kit into the duct and feed it through, rotating as you go to loosen built-up lint along the walls
- Work from both ends if possible — inside at the dryer connection, and outside at the exterior vent hood
- Vacuum again after brushing to remove the loosened lint
- Check the exterior vent hood and clear any debris, and confirm the flap opens and closes freely
- Reconnect everything and run the dryer for a few minutes to confirm strong airflow at the exterior vent
How Often Should You Clean It?
As a general guideline, the dryer vent duct itself should be cleaned at least once a year for most households. Larger families doing frequent laundry loads, homes with long or heavily bent vent runs, or households with pets (which add extra fiber and hair to the lint) may need to clean it every 6 months instead.
When to Call a Professional Instead
DIY cleaning works well for straightforward, relatively short vent runs. However, it’s worth calling a technician if your vent run is long, has multiple bends, or runs through walls or ceilings where a DIY brush kit can’t reach effectively. It’s also worth a professional visit if you’ve noticed warning signs but a DIY cleaning didn’t seem to fully resolve the issue — that can indicate a blockage further down the line, a crushed section of duct, or a vent that wasn’t installed correctly in the first place.
Keep Your Laundry Room Safe and Efficient
A clean dryer vent isn’t just about faster drying times — it’s a genuine fire safety issue that’s easy to overlook. If you’re not confident tackling it yourself, or you suspect a deeper blockage, our technicians provide on-site dryer repair and inspection service across the USA, checking your full exhaust system and making sure your dryer is running safely and efficiently. If your dryer isn’t heating properly even after cleaning the vent, see our guide on dryer not heating: causes and fixes.
