How do I clean my wood deck?

Question

A stray cat showed up with bloody paws and got blood all over it. I tried washing it with dishwashing soap and a spraying it off with a hose but the areas still show up. I have even scrubbed some of the areas, but it is still there.

Answer 1

use a power washer

Answer 2

Hydrogen peroxide is a good blood remover but it might also take the color out of your deck, so just spot treat.  

Also there are deck cleaners and brighteners which contain hydrogen peroxide.  Along that line you could try OxyClean...you might have to do the whole deck as you are likely to get those treated spots so clean the rest of the deck looks gringy.