Baking soda, citric acid, kaolin clay and eucalyptus oil. Dry them hard, then set one in the shower corner.
What You’ll Need
2 1/2cupsbaking soda
1 1/4cupscitric acid powder
1/2cupkaolin clay
2tablespoonwater
1teaspooneucalyptus essential oil
.5 teaspoon peppermint essential oil
40dropsrosemary essential oil
Mixing bowlwhisk, silicone mold or ice cube tray
Directions
Whisk the dry ingredients together in a mixing bowl until even and free of clumps.
Pour in the water slowly, whisking all the while, so it spreads evenly.
Add the essential oils and whisk once more.
The mixture should look like wet sand and keep its shape when squeezed; if it is too dry, add a tiny bit more liquid.
Press firmly into silicone molds or an ice cube tray.
Leave at room temperature to dry and set for about 6 hours (or chill in the refrigerator to speed things up).
Once completely dry and hard, release from the molds (tap or flex the mold if needed).
Notes
Place one in a corner of the shower where it gets wet but won't be rinsed away. Bath bomb version: 3 3/4 cups baking soda, 2 cups citric acid, 3/4 cup Epsom salt or sea salt, 3 tablespoon coconut oil melted, 30 drops eucalyptus, 15 drops tea tree, 15 drops cypress essential oil; add to a filled tub and let dissolve before getting in. Store airtight in a cool, dry place; good for several months to a year; discard if appearance, scent or texture changes. Patch test the dissolved product for sensitive skin; coconut oil leaves the floor slick. Safety: this is a strong essential oil load for the shower air, not for skin; eucalyptus, peppermint and rosemary are not for babies, young children, pets (especially cats) or use in pregnancy without advice; keep dry; not for internal use.