Make your own dishwashing liquid

Put 2 1/2 quarts water in an 8 qt pot.
Grate 1 bar of Octagon soap into the water.
Heat and stir the mixture until the soap dissolves.

Add 1/2 cup baking soda (it will foam up - this is why you need a stock pot),
1/8 cup washing soda, and
1/8 cup lemon juice (or use fresh squeezed lemon juice and freeze it in ice cube trays; put the cubes in a plastic bag and keep in the freezer - I used one cube for this.)

Stir; add more water if it is too thick. Let it cool, then pour into containers to use as you would any dishwashing liquid. The difference in this and store-bought is that there are no suds. It cleans very well, though.