There is no magic formula. Don't be led astray by all of the
complicated formulas and ingredients. What we're going to make here is basic
homemade liquid hand soap. The most economical way to make it is to
save all of the small soap fragments that you�ve collected over time.
However, if you don't have saved soap fragments, a bar of soap will
work just as well.

Here's what you do:

In a pot, bring about 3 cups of water to a boil. While the water is
coming to a boil, shave the bar of soap into fragments, or break up the
already small pieces of left over soap. The smaller the fragments, the
quicker they will dissolve in the boiling water.

Stir the soap into the boiling water until the soap completely
dissolves. Once the mixture is cool, pour it into your old soap dispenser. You
will note the mixture is not as thick as store-bought soap (if
consistency is an issue for you, use less water and more soap). However,
you�ll find the watery hand soap mixture works exceedingly well in creating
a lather and cleaning your hands.

Here's where the advertising and marketing exercise from above comes
into play. The advertisers will have us believe that the thick gel type
liquid hand soap is necessary to get our hands clean. Oh contraire!

If you prefer to have a different scent, experiment with essential
oils. Only a drop or two is necessary.

This is a basic no fluff recipe for homemade liquid hand soap. It will
clean your hands thoroughly. After all, that's what you want the soap
to do, isn't it?

I suggest grating the soap as it does take quite a while to melt.