Pet urine carpet cleaning takes more power and suction than a rented machine has. Urine soaks past the fibers into the backing and pad, and a rental can't pull it back out. It tends to push water down and leave the carpet too wet, which is how a spot that looked clean...

Elite recommends having carpet professionally deep-cleaned every six months. The carpet industry's general guideline is every 12 to 18 months, which fits a light-use home: one or two adults, no pets, shoes off at the door. Homes with pets, young kids, allergy...