Several years before he died, my Dad was seeing a doctor for knee pain. He wasn't a candidate for replacement surgery so the doc was discussing options. He told Dad, "I can't prescribe this but I had an 85 year old patient who suddenly started doing better. I asked him what happened and he said he rubbed WD-40 into his knees every morning and it made a world of difference." Dad decided to try it. Every morning he'd go out to his shop, smoke his pipe, and rub WD-40 on his knees. He swore it helped. When he finished, he would rub his hands on his dog. Dog didn't have fleas that year either. I'm just sayin ....