1 bar Castile soap (traditionally a soap made with olive oil only, today it is often considered a soap made with vegetable fats only. You should be able to find castile soap in a health food store)
8 cups of water
3 T glycerin (found in drug store)
Fragrance or essential oils of your choice, as much as desired
Begin by grating your bar of castile soap. You can do this by hand with a cheese grater or if you have a food processor that will grate you can use this and it will go much quicker. Put your grated soap into a sauce pan and cover with water. Simmer until the soap has melted. Add glycerin and scent oils. Let this mixture sit overnight (or all day). Then pour into desired containers.
** Tea tree essential oil is considered to have good antibacterial properties