If you really want to combine different scents, make sure that they go well together, such as lemon and lavender. Avoid using soap with added moisturizer. This tends to make it harder to set up.
It’s best to use distilled water. If you are using filtered water, bring it to a full boil first, then let it cool down until it is just hot. [3] X Research source
Don’t be alarmed if the soap starts to cloud up after a couple of hours. This is normal.
You only need to mix the soap for a few seconds—just long enough to get it loose again. If the soap is too firm, add more water, then blend it again.
If your soap was already fragranced to begin with, you may want to skip this step.
Potassium hydroxide is caustic. Work in a well-ventilated area, and wear safety goggles and protective gloves. [12] X Research source
You will have to use a soap-making calculator to figure out precisely the amount of essential oil you should use.
