Baking soda: I buy a large bag at my local Costco for under $5.
Essential oils of your preferenceorange, lemon, peppermint, and lavender are my favorites. But I bet pine, eucalyptus, and cinnamon would all be great too.
Smelly herbs: It's not necessarybut I grow my own lavender and rosemary, and have also used cinnamon powder as I have them available.
Instructions
I pour a bit of soda into a quart size mason jar, then use a few drops of preferred essential oil, followed by more soda, then repeat. How much essential oil you use is totally dependent upon your own nose: mine likes it pretty strong! 20 drops total should be plenty!
I give it a thorough shake and store in a closed mason jar within my cleaning caddy, ready to go!