What Lint Buildup Looks Like — and What a Proper Cleaning Includes

You cannot see inside your dryer vent, which is exactly why buildup gets so bad before anyone acts. Rather than show you stock "before and after" photos, here is a plain description of what technicians actually find inside neglected vents in this region — and precisely what a proper cleaning should include, so you can judge any company's work, including our partner's.

What builds up in there

Fresh lint is the soft grey fluff you know from the lint screen. Inside a duct it does not stay that way. Mixed with the moisture in dryer exhaust — and in a Peace Region winter, frozen and thawed dozens of times — it compresses into a dense grey felt that coats the duct walls and packs solid into elbows. In a typical never-cleaned vent, the usable diameter of a four-inch duct can be reduced to half or less. At the exterior hood, lint mats into a visible "beard" around the flap, and in the flexible transition hose behind the machine it collects in the sagging low spots along with the odd sock. A moderately neglected single-family vent commonly yields a grocery bag of material; badly neglected ones, more. Gas dryer exhaust adds moisture, so those ducts often pack wetter and harder.

What a proper cleaning includes

1. Disconnect and inspect — the dryer pulled out, the transition hose checked for crushing, tears, and lint load.
2. Full-length rotary brushing — a spinning brush on flexible rods driven through the entire duct, machine to termination, working every elbow, with a vacuum capturing dislodged lint. Not a leaf blower, not a vacuum held at one end.
3. Exterior hood service — the lint beard removed, the flap freed and checked for full swing, ice cleared in winter.
4. Reassembly done right — the hose reattached without kinks when the machine goes back.
5. Airflow verification — the dryer run while the technician confirms strong, warm flow at the exit. This step is the proof; a cleaning without it is a guess.

You should also expect the technician to tell you what they found — and to flag genuine problems like crushed hose or foil duct that needs replacing with a price, not pressure.

Judge it yourself

After any cleaning, put your hand near the exterior hood while the dryer runs: strong warm airflow and a fully open flap mean the job was done. Weak flow means it was not. That simple test, plus the symptom checklist, is all the quality control a homeowner needs. Due for one? Request service here.