Hello, I'm Dr. Judy. As a cat rescuer myself, I understand your frustration. Unfortunatley with tom cats, they are going to spray over the areas where other toms have sprayed in order to mark their territory. The only thing that can decrease or stop this is to get all the males neutered ASAP. One thing that will help with the spraying (and odor--yuck!) is to get a product that neutralizes the urine. I prefer Thornell's Cat Odor Off. I recently found the concentrate on Ebay for about $11.00. Mix it with water according to the directions and spray over everywhere they have sprayed (if the area has been sprayed heavily, I found that it helps to rinse with water first). You may have to repeat this once or twice to completely get rid of the odor. Trust me, this stuff is awesome and has removed 99.9% of the tom cat odor from my newest one--I always have a bottle ready to go in case I get a whiff of any urine. The key is to stay on top of it--ah, the joy of male cats. Good luck.