Try a new Bath Bomb recipe that doesn't use Citric Acid.
In a large mixing bowl, add the baking soda, buttermilk and cornstarch. Mix the dry ingredients together with a spoon or your hands.
In a microwave safe measuring cup melt the coconut oil.
To the coconut oil add the orange essential oil and colorant. Start with 1 teaspoon of colourant (if you are using my planet based one, or a few drops if you are using the liquid) and mix it in. If you wish to add polysorbate 80, now is the time to do it. 1 tablespoon should be sufficient.
Now add the liquids to the dry mix. Mix everything together thoroughly.
Finally, mix in about a tablespoon of dried orange peel. If you wish a darker colour, add more colourant and mix it in.
Pack the molds and form the bath bombs.
Let dry for 24 to 48 hours.