
I use biological laundry liquid, the cheapest one I can find.£1.50 for 2 litres The enzymes digest the bacteria the cause the smells. I got that advice from this very forum, and it works a treat.
I dilute a measure in a watering can full of water, and then I scrub the paving slabs with a yard brush and allow to dry. In a couple of hours the smells have gone. Voy lah.
Dawn R.