by craftbits (shellie wilson)
What you need
2 cups of Soap flakes or grated soap
1 gallon (4 litres) of water
1/4 cup of glycerin
2 cups of Shampoo or dish washing detergent
Scented oils of your choice
Mix the soap flakes with the water.
Add 2 tbs of glycerin into a saucepan and place on a low heat.
Stir occasionally until the soap has dissolved.
In a large bowl, add about 2 cups of this mixture to the rest of the glycerin and shampoo.
Add a few drops of your scented oil.
Put it all into a nice storage container.
To use: Add 1/2 cup to your running bath water.