Readers reply: The inside of my cardigans never become bobbled. Can’t the pieces be sewn together inside out?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts

This week’s question: Which organisms are most beneficial to humans without us realising?

The inside of my jumpers and cardigans never become bobbled, despite the friction that must occur. So why can’t the pieces be sewn together inside out? Helen, by email

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