Pet Urine Stain and Odor in Carpet
easy 30–90 min
Tools: UV flashlight (blacklight), white towels, spray bottle, wet-dry vacuum if you have one · Materials: enzyme cleaner made for pet urine, white vinegar
Steps
- Find every spot with a blacklight in a dark room — urine glows pale yellow-green, and there are usually more spots than you can smell.
- On a fresh accident, blot with towels until nothing more comes up, standing on the towel to press into the pad.
- Rinse the spot with cold water and blot again; skip steam or heat, which cooks the proteins into the fibres.
- Saturate the area with an enzyme cleaner so it soaks as deep as the urine did, cover with a damp towel, and leave it for the full time on the label — usually several hours.
- Blot or extract with a wet-dry vacuum, let it air-dry, and check with the blacklight; a faint glow means repeat the enzyme step.
- Keep the pet away from the spot for a week and clean the litter tray or walk more often — repeat accidents mean the smell was still there for the animal.
Stop and call a pro if
- the stain has reached the subfloor — the wood or concrete is discoloured when you lift the carpet
- the smell returns on humid days after two enzyme treatments
- the carpet is wool or the pad is crumbling
What a pro does that you can't
A carpet cleaner treats the pad and subfloor with sub-surface extraction, seals the subfloor with a shellac-based blocker, and replaces the pad where the urine has crystallised in it.
DIY cost: $15–30 for enzyme cleaner and a blacklight