Zest a lime, using a cheese grater or other fine zester or grater. Pat dry with paper towel to reduce the moisture in the lime zest.
Cut the soap into 1 inch chunks to make sure the soap base melts evenly.
Melt the soap base in the microwave for 30 seconds at a time.
Stir the soap base. If it is not completely melted, put it back on for 10 second at a time, until fully melted; stirring each time.
Add the lime zest and mix in to the soap base.
Add the coconut essential oil drops and mix well.
Carefully pour into your silicone mold and tap the mould gently to release any air bubbles and to make sure the top of the soap is level. Lightly sprinkle with more lime zest on top of the liquid soap mixture.
Mist lightly the top of the soap with rubbing alcohol to help reduce bubbles further. Let set for a minimum of 3-4 hours or overnight.
Remove carefuly from mold making sure that you don't break the soap. Using the straight scraper, cut the soap into 1 inch (2,5 cm) bars.
I usually wrap my soap first tightly in a cling film and then in a pretty paper wrapper. This way the soap keeps for few months and doesn't dry.