I have a 4 year old cat that always used the litter box until 6 months ago. I sift the litter every day and completely empty and scrub the box twice a week. Our vet says that she is in good health. She only uses the bathroom on any clothes that happen to be in the floor. Please help!
Try 2 litter boxes so she has more options, pick up all cloths from the floor and clean any soiled area with natures miricle. Natures miricle nutralizes the scent. If this does not work then talk to you vet about valium. Vetcare