Bath Bomb Help – The Top 5 Trouble Shooting Questions Answered

I thought mastering the bath bomb would be the death of me.  For a few years now I’ve tried to make bath bombs for myself and gifts.  I’ve sat with tears in my eyes as I stared at the crumbly mess around me.  I’ve tried changing the recipe, using witch hazel instead of water, salts and no salts. Nothing really stopped my bath bombs from fizzling out prematurely, cracking o becoming soft a few days later. Now the good news is that messed up bath fizzies, once dry, can be broken up and put in a jar for bubble bath.

Bath bombs are great project for both beginner and advanced crafters. Making bath bombs is an easy process, but it takes practice. Bath bombs are sensitive to moisture. Without the right mixture of ingredients bath bombs can crumble, fall apart, expand or fizz incorrectly. Before we get started on how to make a bath bomb let’s go over what not to do.

Below are some of the 5 most common bath bomb questions I have received.

1. Is your bath bomb crumbling or cracking?

If you find that your bath bomb is crumbling, the mixture is probably too dry. Adding more witch hazel or oils keep your bath bomb from turning back to powder or cracking once removed from the mold.

2. Is your bath bomb soft?

If your bath bomb is soft , there may be too much moisture. If you make this mistake and add too much witch hazel or oil during the mixing process, add more of all your dry ingredients to balance the texture. If you live in a humid, wet climate, you may need to cut some oil out of your recipe. Experiment with a little less oil and see if this helps. If this doesn’t help the moisture in the air could be preventing the bath bombs from hardening. Adding a small amount of clay (like kaolin clay) or cornstarch can help. Check out our last post about the ingredients you can use to customize your bath bomb and what they do. Here

3. Does your bath bomb have lumps and bumps on the surface?

A bumpy bath bomb is usually a result of clumps in the dry ingredients or not fully mixing the fragrance oil. Baking soda in particular tends to clump together. Before adding oil, color, fragrance or other additives, break up large clumps with your hands or use a strainer. This gives your bath bombs a smooth surface. Mix your ingredients extra well to ensure the wet is fully incorporated into the dry.

4. Is your bath bomb not fizzing very much?

If your bath bomb is not fizzing in the tub as much as you’d like you can try a few things. You may want to try try increasing the amount of citric acid in your recipe. You can start with a mix of 2 parts baking soda to 1 part citric acid. Also if you use cornstarch in your recipe this will decrease some of the fizzing reaction.

You may try decreasing the amount or eliminating it all together. The more oil you use the less the bath bomb will fizz so you could also try using less oil.

If your bath bomb comes in contact with moisture from the air or from a damp environment this can also cause the bath bomb to have less effect in the water. To protect it from moisture, wrap it tightly with plastic wrap but make sure the bath bomb is extra dry since wrapping them wet will cause them to retain the excess liquid and make the bath bomb soft.

Additionally the fizzing will decrease as the freshness fades. The sooner you use your bath bomb after it drys the better!

5. Is your bath bomb growing and expanding out of the mold?

If your bath bombs or bath bomb mixture is growing, this means the mixture is too wet and the fizzing reaction is happening prematurely. If you use a colorant or fragrance that contains water, this can cause the bath bomb mixture to vegan reacting. Also bath bomb mixtures can fizz prematurely due to moisture in the air. For example, if you make bath fizzies on a moist and rainy day, this can cause the bath fizzies to expand in the mold.

To learn more (Ex: how do I make my bath bombs float? What colorants are best for bath bombs?

check out the Advanced Bath Bomb Recipe EBook!

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