Carpet Cleaning: Pet Urine Smell

Why urine smells come back after cleaning — and what actually removes them.

Urine reaches the carpet backing and underlay, so surface cleaning leaves the smell behind — and humidity reactivates it. Effective treatment means enzyme-based products that break down uric acid crystals, treating the backing and underlay, not just the face fibre. This guide covers what works, what wastes money, and when replacing underlay is the honest answer.

See also: typical UK prices and the cleaner checklist.