How do you stop a dog from urinating in one spot?

Spray vinegar on the spot where the dog often urinates. Dogs usually return to the same place by following their own urine scent, but vinegar’s pungent smell makes them avoid it, so they give up that spot.

Also clean any accident promptly and spray deodorizer to remove the scent. Finally, provide a small dog toilet and train the dog to use it, preventing random urination.