Suffer cramp in the legs a lot. Last year my partners aged dad mentioned similar and that a lady had once told him to put a bar of soap under his pillow each night, to his amazement it worked and reduced his cramps to next to nothing. Sceptically I tried similar and yes it worked and is working for me, has cut my cramps down considerably and just get the odd twitch now and then, about the only twitch I seem to get these days :)
So lets hear your tales and experiences