Because the source is still there. Moisture in the air reactivates urine compounds deep in the pad. Surface cleaning removes what is in the fibers; the reservoir below needs enzyme treatment that reaches where the urine actually went.
Yes - we map the real contamination footprint during inspection, which is routinely several times larger than the visible stain. Treating only what you can see is why DIY attempts keep failing.
Yes - the enzyme chemistry we use is family- and pet-safe, and everything is extracted and rinsed residue-free. Rooms are back in use as soon as they dry, usually about an hour.
Same science, different surface - we treat and clean upholstery with fabric-matched methods. Cushions and frames that have taken repeat accidents get an honest assessment of what treatment can and cannot rescue.