People love their headphones. Some wear headphones when they're out walking, jogging, even in the hot weather. After a period, when they accidentally get a whiff of their headphones, they smell kind of nasty. They start thinking how to get rid of the smell. They searched every possible ways and find they're all time consuming. During the cleaning process they can't even listen to music. One day, a clever guy comes with a brilliant idea. That's replacing.
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