Fixing a broken bronzer stick can be a bit tricky, but with a little patience and the right tools, it's definitely achievable. Here's a step-by-step guide:

1. Gather Your Tools: You'll need a clean spatula or butter knife, a small microwave-safe bowl, a clean cloth or paper towel, and a little bit of rubbing alcohol.

2. Clean Up: Use the spatula or butter knife to carefully remove the broken pieces from the bronzer stick container. Be careful not to lose any product.

3. Melt It Down: Place the broken pieces in the microwave-safe bowl. Microwave it for a few seconds at a time, checking frequently until it's just melted. Be very careful not to overheat as it can change the consistency of the product.

4. Reassemble: Once it's melted, carefully pour the liquid back into the original container. If the container was damaged, you can pour it into a clean, empty makeup container.

5. Let It Set: Allow the bronzer to cool and solidify. This could take a few hours to overnight depending on the size of the stick.

6. Smooth It Out: If the top of the bronzer is uneven once it's solidified, you can use a clean cloth or paper towel dipped in a little bit of rubbing alcohol to smooth it out.

7. Let It Dry: Allow the alcohol to evaporate completely before using the bronzer again.

Remember, it's important to keep your tools and workspace clean to avoid introducing any bacteria into your bronzer. Also, the heat can potentially alter the texture and performance of the product, so it's best to do this only if you're comfortable with potentially changing the formula a bit.