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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.
WD40 Tip Most people know that it can get rid of a squeeky contact point like the swivel mount on mobility scooters or a door hinge, but don't be tempted to spray it in stiff moving electronics parts, it will often damage them if not ruin them.-- Anon. Another WD-40 miracle.f the cable won't rewind back inside your vacuum cleaner, squirt WD40 into the mechanism, also squirt some on the cable and rub along its length to lubricate the cable. It will do the trick! -- Mark Harmer. Sticky labels.