Cleaning outdoor dog potty area?

I have an area outdoors which is 'floored' with concrete paving stones (they are not sealed). This is the area I have trained Cube to go to the bathroom and he is very good about it. Though the area is sloped to allow the urine to drain off, most of it doesn't because he is a small dog and the area doesn't get much rain (and in the winter it freezes). So there's a pretty lovely smell lingering there. (I know I should hose it off more, but I hate wasting so much water.)

I read *somewhere* about a mixture I could make with peroxide or perhaps vinegar, water and a little bit of dish soap which would remove the smell from this area. But I can't find the 'recipe' now.

So I'm hoping that someone here has some suggestions. It's not a huge area, so I can apply whatever with a bucket, I am open to scrubbing it with a brush if needed and hosing it off after. But I need to do something soon because the hotter it gets the stinkier it gets!!

Thanks in advance,
Melissa

I used to keep a jug of water nearby. A cup of water right away is very eco friendly.
My old Lab would sometimes not get off the steps fast enough and she would pee right there.

A lemon dish detergent ought to do the job for scrubbing. You can also mix 2 parts water, 1 part lemon dish detergent, and 1 part rubbing alcohol or mouthwash in a hose end sprayer, attach to hose and spray down, then rinse.