What chemicals do you have an aversion to? Any wood deck wash will contain chemicals, including soap.

I make my own wood deck wash that is more effective than commercial products and pennies on the dollar.

10 parts water to 5 parts laundry bleach, to 1/4 part dishwashing soap.

thanks for the formula - deck is surrounded by bushes and just was looking for something that you do not have to worry about your landscaping and pets - your formula sounds just like the right thing - thank you so much.

While deck cleaning products are widely available, one of the most effective ways to clean your deck is by using a homemade wooden deck cleaner. Oxygen bleach is effective at removing dirt, dust and stain from decks.