The soap in bed really works do not know how but I think everyone should know of this. I put bar of soap in cotton sock, tie top upand keep near my feet in bed. Lasts for about about 4 to 6 weeks then starts drying out. Either change for new one or grate outer surface area off to refresh. Used to be terrible with toe, foot, ankle and leg cramps. From night one it worked. I am 70 years old. This morning I was sat for longish time and got toe cramps so I cut a sliver of soap of bar and put in my sock. 30 seconds later cramp gone. That quick. I have been trying to find the lady on line who posted her video telling about this. Would like to thank her so very much.