How to Make Fizzy Bath Bombs

It's time to test the bath bombs mixture. The desired consistency is kind of like wet sand - just barely wet enough to stick together. Pick up a half handful of the mix and squeeze it together. Does it clump into a ball? More important - does it remain clumped into a ball? If so, great, you can begin molding the bath bombs. If they're still too dry, use your spray bottle of water to add just a bit more water. Just a bit! It only takes a few sprays of water to make a big difference.

If the mix is too wet, it's harder to fix. You can add a bit of salt, cornstarch, or more baking soda and citric acid (at a 2:1 ratio). But, especially until you get the hand of them, it's better to err on the conservative side and add too little water than too much.