Combine the Ingredients: In a medium bowl, mix together the baking soda and cornstarch.
Add Scent: Add 5 drops of your chosen essential oil to the mixture and stir well to combine.
Prepare the Jar: Using a funnel, pour the mixture into a jar with a tight-fitting lid.
Make Holes in the Lid: Use a hammer and nail (or a drill) to punch small holes into the lid of the jar, allowing for easy sprinkling.
Apply the Deodoriser: Sprinkle the homemade deodoriser onto your carpets as needed. Let it sit for at least 30 minutes before vacuuming up to allow the scents to permeate the fibers.