Have your carpets smelling fresh without having to spend a lot of money or use any harsh chemicals.
Take an old, clean spice container that you no longer are using to mix the "ingredients."
Pour 1/2 cup baking soda and add 20 drops of tea tree oil and 20 drops of lavender essential oil into the shaker.
Shake it all up and let it sit for 24 hours.
After that, when you are ready to vacuum, shake the freshener on your carpet and let it sit for 10 minutes. Then vacuum away.
I think you will be very impressed with how clean and fresh your house smells. A simple, frugal solution to helping you save money.