Mix the baking soda and citric acid in a glass bowl. I suggest wearing a mask and some latex gloves for this to protect your skin and eyes).Slowly mist the dry power with water, mixing as you go.You want to achieve the consistency of wet sand.Add the essential oils and continue mixing.When done mixing, you'll need to separate this mixture into single use sizes. You can either use a ½ - 1 tsp measure and place them on a piece of parchment paper until they dry, or use a silicon mold (I used this one).Let dry overnight and carefully place in an airtight container like a jar or a gallon zip lock bag and use as needed.