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[deleted] t1_j22p3j3 wrote

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Thorn_the_Cretin t1_j22v1in wrote

Nah it’s a real thing. I never thought about tennis balls specifically, but it has something to do with the small object helping to continuously move/shift the articles in the dryer so they can get a more even dry. Helps prevent stuff like when blankets get all rolled up so the center is still damp.

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