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Why do socks get smelly?

Answer:
Socks become smelly because heat and moisture in shoes and socks promote the growth of fungi (such as athlete's foot) and other bacteria. The waste products of these microbes combine with sweat and can produce volatile, noxious odors.
First answer by ID1533890701. Last edit by Dfoofnik. Contributor trust: 2551 [recommend contributor recommended]. Question popularity: 6 [recommend question].