This is the perfect opportunity to use whatever you have lying around! I used dish washing soap and olive oil for at the beginning because that's all I had, and it still worked... a bit drying, but worked. Have fun creating your own recipe!
Preparation time: 2 minutes
Shelf life: Depends, maybe a month or two?
A small clean container.
Liquid soap (optional).
As many oils as you want: glycerin, coconut oil, sweet almond oil, avocado oil, olive oil, etc.
Theory: The plasticizer in the clay is a mixture of phthalates (not for long, most brands are phasing them out). Phthalates are slightly fat soluble, so the oil will help remove them. I did a test with several oils and I couldn't find a significant difference between oils, they all worked fine. The sugar will do the scrubbing, getting in hard places and getting rid all of those stubborn bits of clay under your nails or in the wrinkles of your fingers. Using only sugar and oil made my fingers feel a bit oily, so I add some liquid soap to the mixture to remove all the extra oil
Honey (for extra hydration).
. Everything else is just extra, in case you want to add some benefits to your scrub.