What is the purpose of cleaning inside the dryer drum?
Cleaning helps prevent odor build-up in the dryer drum; apply a paste made from powdered laundry detergent and warm water to a soft cloth or use a liquid cleaner appropriate for use in appliances, then wipe down with a damp cloth (Page 23).
From the official Whirlpool Wdh70eapw manual, page 24
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