Acidify that smell!

If you think the smell of cat urine is offensive (and it assuredly is), then you know that your cat’s ultra-sensitive nose doesn’t like it either. If her litter box isn’t cleaned out regularly, a cat will do the obvious thing and start urinating somewhere else.

Scoopable litters have made tending to litter boxes less of a chore, but you still have to wash out the whole pan thoroughly from time to time. When cleaning it, keep in mind that urine is basically alkaline. So is ammonia, so if you clean the box with ammonia or an ammonia-based cleaner, you will only increase the urine smell. Use something acidic like vinegar or lemon juice, which neutralizes the urine smell.