Blot up as much fresh urine as possible with paper towels or a clean cloth
Rinse the area lightly with cool water and blot again
Apply an enzymatic pet urine cleaner to the carpet and padding
Let the cleaner sit for the full time listed on the product label
Blot the area dry with clean towels
Repeat the enzymatic treatment if the smell remains
Sprinkle baking soda over the dry area and let it sit for several hours
Vacuum up the baking soda thoroughly
Use a wet-dry vacuum if the carpet is heavily soaked
Clean the carpet pad and subfloor if the odor has soaked through
Avoid using steam cleaners before the odor is removed
Avoid ammonia-based cleaners
Air out the room and use fans to help the carpet dry
Replace the carpet padding if the smell persists after cleaning
Call a professional carpet cleaner for severe or old stains