Here are 11 ways to remove cat urine odor:

White vinegar cleaning: Mix white vinegar and water and use it to clean stained areas.
Baking soda: Sprinkle it on urine stains to absorb odors.
Enzyme-based cleaners: specially formulated to remove pet stains and odors.
Oxidizing agents, such as hydrogen peroxide, can break down urine molecules.
Alcohol: helps eliminate odors.
Citric acid: has deodorizing effects.
Ultraviolet lamps: Irradiate contaminated areas to kill bacteria.
Steam cleaner: Deeply cleans and removes odors.
Adsorbents, such as activated carbon, absorb odors.
Open windows for ventilation: allow air to circulate and dissipate odors.
Professional cleaning services: If the problem is serious, seek professional help.