She has a particular dislike for citrus. I read that cats don't like citrus and have successfully used a citrus room spray as a deterent (once she thought the pot of a silk plant made a good litter box and occasionally she mistakes the dining room for her litter box -- but only if we go on vacation.) When she has an accident I spray the lemony stuff and she avoids that spot!

She has her own -- just for cats -- perfume I bought her in Paris but her favorite scent remains ----FEET