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Many household items neutralize the smell of urine, including fabric sprays and baking soda, a great odor absorber. Or try combining baking soda and hydrogen peroxide to cut through the smell. If these items don’t work to completely remove the smell of pet urine, try an enzymatic cleaner, which works to break down organic matter such as urine, and is readily available at most pet stores.

Vinegar is acidic and makes a great cleaning agent for many items throughout the house, including some upholstery. It should not be used for any upholstery with the code S or X. It can be used for W labels. To use a vinegar solution, mix equal parts water and vinegar and blot the stain using a gentle circular motion with a clean microfibre cloth and then allow to dry completely. As with any DIY solution, test a small and inconspicuous section first.

To remove pet urine stains and odors from a microfiber couch, first blot the area to absorb as much liquid as possible. Then, generously cover the spot with baking soda and let it sit for a few hours to absorb the odor before vacuuming it up.

For cleaning the stain itself, you can use a commercial urine stain and odor removal spray—be sure to follow the product's instructions.

Alternatively, you can use a DIY solution based on your couch's cleaning code:

• For 'S' code couches: Lightly spritz the stain with rubbing alcohol and gently scrub with a microfiber cloth.

• For 'W' or 'S-W' code couches: Use a mixture of one cup of vinegar and one cup of rubbing alcohol, spritzing and scrubbing the area gently.

The duration of mildew smell in carpets depends on several factors, including the extent of moisture, cleanliness, and ventilation. If promptly addressed, the smell can diminish within a few days to a couple of weeks after thoroughly drying and cleaning the carpet. However, in severe cases or if not properly treated, the smell might persist. Persistent odors could indicate deeper mildew growth, requiring professional cleaning or, in extreme cases, carpet replacement to completely eliminate the smell.