Stir in the liquid dish soap and lemon zest and juice of a lemon (or essential oils). The mixture should be a wet sand consistency; if it is not, add a little water until it becomes the right consistency.
Use a 1/4 cup to mold the disposal fresheners, and then place them on a parchment-lined baking sheet.
Let the refreshers dry overnight, and then place them in a glass jar to store.
I recommend using these natural garbage disposal refreshers within a week if you plan to use fresh citrus juice and zest. If you would like for them to last longer, I recommend replacing with a few drops of aromatherapy essential oils instead.