Our 1yo female cat, who we've had since she was a kitten, has always used the tub/ shower/ bathroom sinks as litterboxes. It was rarely, and never when we were around, and only to pee, so I tolerated it. But she recently developed a UTI. She's on anti-biotics now, and responding well. But first she took to peeing in the sinks constantly, and even in front of us, and now she won't stop! She's still using her real litterbox, but she jumps in the sink anytime one of us is in or near a bathroom. She doesn't even flinch if I turn the water on her. It's driving me crazy and I just want her to stop. Is there a cleaner I can use in the sink to drive her away? A cover I can put over it? Anything? Has anyone ever had success with this problem?