Problems
You cleaned it. You used the enzyme spray, then the carpet cleaner came and "did the rug too," and for a month it was fine. Then July, and the smell is back. This is the single most common phone call we get from Nassau and Suffolk, and the reason is always the same.
When a dog or cat urinates on a rug, the liquid passes through the pile in seconds and into the foundation, the cotton warp and weft that the knots are tied onto, and then into the pad and often the floor. The water evaporates within a day. What stays behind are urea, uric acid and salts, crystallized inside the cotton. Under UV light the contaminated area is typically several times bigger than the visible stain.
An enzyme spray wets the surface and the top of the pile and dries. A truck‑mount carpet cleaner pushes hot solution into the pile and pulls most of it back out, from the top. Neither reaches the crystals in the foundation, and neither can, because the only way to dissolve them is to submerge the rug and give the water time. So the surface is clean and the source is untouched. Every humid day the crystals absorb moisture from the air and release ammonia, and the rug smells again.
Urine salts are alkaline. Left in a wool rug they slowly loosen the dyes around the stain, which is why a rug with old urine so often bleeds when someone finally wet‑cleans it without checking under UV first. They also weaken cotton foundations over years. The sooner the salts come out, the less damage is done.
At the plant the rug is checked under UV so we know the real extent, dusted, and then submerged in a bath with a urine‑neutralizing solution and a dye stabilizer for hours, sometimes overnight. The crystals dissolve into the water. The rug is then washed and rinsed until the water runs clear and odor‑free, spun, and dried flat. Because the source is gone, the smell does not return.
The pad has absorbed urine too and usually cannot be cleaned; replace it. Hardwood under a long‑term pet spot may be stained; that is a floor question, not a rug one, but it is worth knowing before the rug goes back down.
These cannot be soaked. A repeated low‑moisture flush and neutralizer reduces odor substantially but not always completely, and we say so before we start. On wool rugs, which is most rugs, the result is complete.
Drop‑offs welcome any day; call ahead and you can watch the dye test.
Yes, with a soak that dissolves the salts in the foundation, followed by a full wash. Sprays and floor cleaning cannot do it.
Usually. Yellowing on ivory wool from urine comes out with the soak and wash; very old urine that has changed the dye can leave a faint mark.
Remove the source. Dogs return to spots that smell of urine to them, even when they no longer smell to you.