If a pet odor keeps coming back after cleaning, the surface was never where the problem lived.
Pet odor complaints are one of the most common calls in this trade, and also the most misunderstood. The smell people are trying to get rid of usually is not sitting in the carpet fiber at all.
Urine is liquid, and liquid follows gravity through the carpet fiber, through the backing, and into the pad underneath. In a repeated-accident spot, it can go further, into the subfloor itself. By the time anyone notices the smell, most of it is no longer on the surface.
A cleaning pass that only reaches the top of the carpet can genuinely improve the smell for a while, because it is removing what evaporates and off-gasses from the surface. It does not reach what soaked through, which is why the smell so often returns within days or weeks, especially as humidity changes.
In a light, fresh, one-time accident, treating carpet and pad in place from above is usually enough. In a spot with repeated accidents, or an old, fully set stain, the pad in that specific area typically needs to be pulled and replaced — treating it further does not remove what has already broken down inside it.
A fresh accident is far easier to fully treat than an old one. Urine left to sit crystallizes as it dries, and those crystals reactivate with humidity long after the visible stain is gone, which is part of why an old smell seems to come and go with the weather.
A wood subfloor can absorb urine and hold odor longer than a concrete slab does, which affects how far treatment needs to reach in a bad spot. This is part of why an honest assessment sometimes means checking under the carpet before quoting a fix.
It starts with identifying how far a spot has actually gone, not assuming the worst or the best. Fresh, limited accidents get treated in place. Bad, repeated, or old spots get an honest recommendation to replace the affected pad. Anything past that — carpet that needs pulling up and re-stretching — gets referred to a flooring contractor instead of being cleaned over.
Tell us the square footage and what you are dealing with and we will call back with a real number.
Get a Cleaning QuoteA few details on the rooms and any stains is plenty — we will follow up with a straight quote.