I purchased a spray-on stain remover from Carpet Dry-Tech and was amazed at how effective it was at removing pet stains. Initially I used a small portable carpet cleaner and although it removed some of the stain it did not thoroughly remove the odor. I sprayed the Carpet Dry-Tech pre-spotter on the area and repeated the process. The stain and odor were completely gone! The fresh scent of natural citrus was really appreciated as I am an asthma patient and react badly to harsh chemicals. I would highly recommend this product and this business.