As a professional carpet cleaner in Tampa FL I have to set the record straight about this video on removing cat pee. The only item in this mixture that will help with cat pee smell is baking soda. Baking soda will absorb some of the cat pee odor but it will not break down any of the Uric Acid, the substance that releases ammonia as it breaks down. The faster the uric acid breaks down the faster the urine smell goes away. In the end baking soda is just a short term band aid, as the real problem has not been dealt with.
The most popular way to speed up the decay of the uric acid is to use an enzyme based cleaner that acts as a catalyst that accelerates the decay rate. They can be very effective if applied while the cat pee is still wet. It gets much more difficult if the pee has dried before it has been cleaned.
Removing dried cat pee is tough. There are no real home remedies for removing cat pee once it has dried because the real problem is under the carpet. The cat pee has already found it's way through the carpet, down into the carpet pad, and onto the sub floor. In Tampa FL the sub floor is a concrete pad and it can absorb and hold urine odors as well. At Chem-Dry of Tampa FL we have done some extreme cat pee removal where the flooring was stripped away and the concrete wash pressure washed and treated for cat pee. In most cases dried cat pee in the carpet requires a professional removal service.