This is a post from my health blog. I am sharing on my food blogs as this is important information.
Bacteria can grow in the deep knife cuts on wooden cutting boards because wood is porous and nearly impossible to clean. A quick wipe is not enough to kill the germs on such a board. To be sure you are getting rid of all the germs, soak wooden cutting boards in 1 tablespoon of bleach per gallon of water for at least 2 minutes. Wash the board with hot soapy water following the soaking.