Make Bath Bombs:
1. Add your baking soda, citric acid, and any salts to a bowl and whisk together well. Bure sure to break up any clumps. Additives can also be added at this stage.
2. Once your dry ingredients are well mixed and no clumps are remaining, add your fragrance oil. Whisk well and distribute the fragrance as much as possible. It will be clumpy, so you need to just keep whisking.