Combine baking soda, citric acid, and cornstarch together.
Whisk them well in your mixing bowl.
Make sure there are no lumps left.
This creates the base for your melts.
Pour in your eucalyptus essential oil drops.
Add peppermint oil if you want extra freshness.
Mix everything together thoroughly until oils distribute evenly.
Spray water into the mixture little by little.
Mix constantly while adding water.
The mixture should feel like wet sand.
Don't add too much water at once.
Press the mixture firmly into your molds.
Pack it down really tight with your fingers.
This helps them hold their shape perfectly.
Fill each cavity to the top completely.
Leave your molds in a dry spot.
Wait 24 hours for them to harden completely.
Don't touch them too early or they'll crumble.
Patience is key for perfect melts!
Pop out your finished shower melts carefully.
Store them in an airtight container or jar.
Keep them in a cool, dry place.
They'll last for several months when stored properly.