Deep Clear Carpets With Baking Soda If you do not have a carpet shampooer, you are able to deodorize and deep cleanse with baking soda. Just after vacuuming and place cleaning, "evenly sprinkle baking soda and let it sit for at least half an hour—more time if possible," says Dills.The quantity of soaking time is dependent a great deal on Everythi