Bring the water to a boil in a non-aluminum saucepan.Turn off the heat and stir in the magnesium flakes until well dissolved.When cool, pour into your spray bottle. No refrigeration is necessary. Will stay for 6 months.Optional to add some essential oils, such as lavender, thieves or grapefruit.Spray on your body and lightly rub it in. It may still feel a bit greasy or moist on the skin. For me, it is fully absorbed without a residue within a few minutes.Use anywhere from 10-30 sprays per day from head to toe. I do recommend spraying on bottom of feet since the skin is thicker and there is no issue with tingling/burning feeling.