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Dryer vent cleaning — tissue flutter at the outdoor hood

Dryer vent

After dryer vent cleaning, hold a tissue at the outdoor dryer vent hood during a short dry — flutter means airflow is open. One quick beat.

tissue flutter outdoor dryer vent hood — related household tip photo
Photo: Franklin Heijnen / Wikimedia Commons (CC BY-SA 2.0)

After dryer vent cleaning, skip guessing. Start a short timed dry and hold a light tissue near the outdoor dryer vent hood — steady flutter means warm air is moving; a limp tissue means the path is still blocked.

Tissue flutter at the outdoor dryer vent hood

  1. With the indoor lint screen clean, start a 10–15 minute timed dry on a warm setting (no wet load needed for this airflow check).
  2. At the outdoor hood, hold a single tissue a few inches from the opening — it should flutter clearly if the flap and duct are free.
  3. If the tissue barely moves or the flap stays shut, shut the dryer off and recheck crushed hose, lint cake at the hood, and any reverse brush you skipped.
  4. When flutter is strong, mark the clean date on the hood and stop — do not keep brushing a clear run.

Honest stop: a tissue check cannot find a hidden fire hazard inside walls — if the dryer still overheats or smells burnt after a clear outdoor flutter, call a vent pro.

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