My dog pees at night in the same place - on my floor boards. Every morning, I mop and spray - but the room always smells. I tried a lot of products, but when it is humid the smell comes back again. Was passing by Godfreys the other day and came across Enzyme Wizard Urine Stain & Odour Remover. I tried it and no more bad smell. Now use it regularly to remove urine smells off my floorboards and it works beautifully - instead of the stinky acid smell, my floors smell nice! Even my dog doesnt pee as much in the same area any more - he cant smell his urine! Its expensive, but it really works.