Soap Under Sheets For Leg Cramps Has Anyone Ever Heard Anything About "soap Under The Sheets" For Night Leg Cramps.?

Has anyone ever heard anything about "soap under the sheets" for night leg cramps.? - soap under sheets for leg cramps

I'm serious, I really badly and I took a pinch of some television said the doctor that "work Old Wives Tale" rememdy actually. If so, what kind of soap, if I do, and how long it lasts.