In a mixing bowl, combine the soap flakes and the hot water together. It is important the water is hot, otherwise the soap flakes will not melt, rather they may clump up together.
Mix well until the soap flakes are all dissolved. Allow the mixture to cool to luke warm before continuing.
Next you want to stir in both the glycerin and the essential oil, allow it to cool completely.
As it cools you will notice it become a gel like substance. You will want to break the gel down by stirring it with a fork and placing it into a bottle you choose. An old liquid dish soap bottle, shampoo, or conditioner bottle would be a great choice.
You are now done! Use it as you would any other dish washing soap.