We had a problem with our cats urine and I feel like that's a million times worse than dog. He is an old cat and couldn't make it down the steps to his litter box (we have since put a litter box in each floor of our place) and peed in the landing of one of the steps. We tried all method listed here but that darn ammonia smell wouldn't go away. Lucky for us it was in the corner of the landing so we were able to lift the carpet and found that the urine soaked through the carpet padding.
We cut out the carpet padding. And replaced it (it was a few bucks for carpet padding). We then used vinegar and coated the carpet with the arm and hammer pet carpet refresher (basically the same thing as baking soda but it has a nice scent to it). We waited for it to dry and vacuumed it up. I then went back over it with our bissel pet spot steam cleaner. Took 2 times but the smell did go away and our dogs stopped sniffing that area.
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We cut out the carpet padding. And replaced it (it was a few bucks for carpet padding). We then used vinegar and coated the carpet with the arm and hammer pet carpet refresher (basically the same thing as baking soda but it has a nice scent to it). We waited for it to dry and vacuumed it up. I then went back over it with our bissel pet spot steam cleaner. Took 2 times but the smell did go away and our dogs stopped sniffing that area.
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