That is, until you clean it with the Sealegend Dryer Vent Vacuum Attachment. I did and ... let's just say that gross mystery was quickly solved. Why I tried the Sealegend Dryer Vent Cleaner Kit ...
Including 30feet Dryer Vent Brush × 1, Dryer Lint Vacuum Attachment × 1, Lint Trap Brush × 1, Vacuum Cleaner Adapter x1, Dryer Adapter x1 [30feet Dryer Vent Brush] - Easy to use with your drill ...
You'll need a vacuum with a hose attachment and a stiff-bristled brush or vent cleaning brush, along with any tools required ...