Fort Lovrijenac, West Harbor, Dubrovnik, Croatia (© Benny Marty/Shutterstock)

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Seongsan Ilchulbong, a tuff cone on Jeju Island, South Korea (© Quynh Anh Nguyen/Getty Images)

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Berlin Cathedral and Museum Island, Berlin, Germany (© Rudy Balasko/Shutterstock)

A lot of clothes dryers/tumblers have cheap threaded blower wheels that screw onto a motor shaft. Often, the wheel’s threads are stripped from constant thermal expansion. When hot enough (it’s delayed), there’ll be a loud noise of metal spinning inside metal. The motor could be dying too (running hotter than normal) since it has the stronger threads.

One temporary fix involves wrapping copper wire around the motor’s threads for friction… at least while trying to think of a more “permanent solution” that does not involve buying/hoarding perfectly shaped blower wheels indefinitely.

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Lower Yellowstone Falls, Yellowstone National Park, Wyoming (© Tim Fitzharris/Minden Pictures)

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Shark Fin Cove, Davenport, California (© Jeff Lewis/Tandem Stills + Motion)