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A popular myth has grown around the use of WD-40 as a joint lubricant and pain reliever for arthritis. The liquid is sprayed on the painful joint much as one would fix a squeaky mechanical hinge.
Magic spray: Andy (left) and Simon claim that industrial lubricant WD-40 is the cure for arthritis and chest pain. Currently, more than 10 million people suffer from arthritis in the UK alone, and the cost to the NHS runs into millions.