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Why clean your dryer vent? Plugged or partially plugged dryer vents can also result in increased operating costs with longer drying times. This will also cause premature failure of components or the dryer. Overheating can also cause unnecessary wear and tear on clothing, thus shorting their life.
In a recent independent study it was found that a load of 7 large bath towels in a dryer with 62.5% vent restriction took 60% more time to dry the same size load and used 77% more energy than the load without the restricted vent.