Elvis Costello uses washing-up liquid to protect his voice(Pic Credit: Facebook/Elvis Costello)

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English singer-songwriter Elvis Costello was once advised by an expert to spray washing-up liquid into his mouth as a way of preserving his most valuable asset.

Recalling the advice he’s received during his career, Elvis Costello shared: “My favourite is one a renowned throat doctor told me years ago – he’s passed away now but he wrote books about the voice. He told me (to try) one drop of Fairy Liquid in a kind of spray you use to spray your flowers to keep greenfly away.”

The ‘She’ hitmaker explained that the washing-up liquid “stops the cords from sticking”.

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