Collect those bits and pieces of leftover soap. Heat water in a large pan and drop them in. Stir the mix till the pieces dissolve. Don’t put too many together as then they will not dissolve. Bottle the cooled mixture as a liquid hand soap. Vey useful in kitchens and bathrooms.
Alternatively put all the soap bits in a fine nylon mesh bag and tie it. You can now use it as a footscrub.
