Your Nose Lies, Theirs Doesn't

You wipe up the puddle, give it a spray, and the spot smells clean. To you. A dog's nose is 10,000 to 100,000 times more sensitive than yours, so it reads what your nose can't.

Your cleaner choice decides everything. Ammonia is the worst pick: urine already contains ammonia, so an ammonia cleaner makes the spot smell more like a bathroom, not less. Bleach and vinegar may cut the odor you can smell, but they don't reliably break down the uric-acid crystals your dog still detects.