I use the Olympic and buy it at Lowes.

1. Add 2 cups of the bleach to two gallons of water.

2.Pour in 1/4 cup of dish detergent and mix well until it suds.

3.Use a broom or another large brush and cover entire deck.

4.Scrub where there is stubborn dirt and grime and then rinse off.

I also use bleach......and something a bit more powerful than dish detergetn....like Tide! or 409 ..or spic and span... and when the deck gets old and really bad, I pour on straight bleach! Wet the deck first, pour on the bleach, push it around with a broom....scrub where needed and hose it off.