To remove pet urine odors, blot the stained area with paper towels until it is dry, apply diluted vinegar to the area, and vacuum the carpet after it dries. You can also clean dried pet stains with baking soda or cool water and enzyme-containing cleaners.
If the stain is wet, blot the area with paper towels to remove excess urine, and mix equal parts of white vinegar and water. Pour the diluted vinegar onto the stained area, allow the carpet to dry, and vacuum the area thoroughly. To remove odor from dried pet stains, apply a liberal amount of baking soda to the area, and vacuum the area after several hours. Do not allow pets to consume the baking soda.
Alternately, pour cool water over dry pet stains until the area is saturated, and use a wet vac or extraction cleaner to remove the water. Allow the carpet to dry, and apply an enzyme-containing pet stain remover to the area according to the directions on the product packaging. If necessary, wait 24 hours, and reapply the product to remove any lingering odors. Persistent odors occur when urine penetrates the padding under the carpet. If the urine soaks into the carpet padding, remove and replace the affected section of carpeting and padding.