Lint does not stop three feet behind your dryer. It travels the full length of the vent line and settles everywhere: at elbows, along sagging sections, at the roof cap or wall hood, and at the exterior termination where the flap restricts flow. In many homes the worst buildup is at the far end of the line, the part you cannot reach by pulling the dryer out.
A cleaning that only reaches behind the machine leaves most of that buildup in place. The dryer still runs hot, drying times stay long, and the fire risk stays right where it was. The homeowner feels like the job was done because the area behind the dryer looks tidy, but the restriction that actually matters is ten or twenty feet down the line.
This is also why the DIY kits from the hardware store so often disappoint. The brush rods in those kits handle short, straight runs reasonably well. But most Delaware homes have vent lines with elbows, vertical sections, or runs through a crawl space or attic, and the cheap rods either cannot make the turns or come apart inside the line. We have pulled more than a few broken DIY rods out of vents over the years.
Our process runs a rotary brush through the entire line from the dryer connection to the exterior wall or roof cap. The brush spins through every elbow and breaks packed lint loose along the full run, and the airflow carries it out. We clear the exterior vent hood, check that the flapper opens freely, and remove any nesting material or debris at the termination.
Then comes the part most companies skip: we test airflow at the termination to confirm the line is actually clear. You can feel the difference at the exterior vent with the dryer running. Strong, steady exhaust means the whole path is open. Weak exhaust means something is still in the way, and we keep working until it is right.
While we are there, we also check the transition duct, the short connector between the dryer and the wall. If it is crushed, kinked, or made of old plastic or foil ribbon material, we will tell you, because a bad connector restricts airflow even with a perfectly clean line.
That airflow test is the proof. When we leave, you know the whole line is open, not just the part you can see. If your dryer has been taking two cycles to finish a load, call (302) 378-7002 and we will get the whole line cleared in one visit.