Cut up the melt and pour soap base into small, equal-sized pieces.
Place the squares in a large microwavable mason jar or glass jug.
Heat on high in the microwave for 30 seconds. When done, remove and stir.
Continue heating for 30 second intervals, stirring between each interval, until the soap base is melted. This process can also be done in a double boiler.
Let the soap base cool a little before adding in the lime peel powder and mixing through.
Then add the essential oils, if using and stir through.
Gently pour into the mould.
Let sit for a few hours or overnight the bars are set hard.
Remove from mould and store.
Using Dish Soap Bars
Place the soap bar in a small container on your sink.
Wet the soap bar and then rub the dish scrub on it until you see bubbles.