Clean them with a bleach solution.
Clorox Anywhere.
It's a light or mild sanitizing spray that kills germs and bacteria on cutting boards, counertops or anywhere else that food might come in conact with.
It won't hurt or contamimate the food, so it is safe to use around food. I have some. A stronger spray would be Lysol Kitchen Spray, but I don't think that one can be used around or near food. I have that as well.
That one is mainly for after having washed the countertops or table when poultry, beef or pork was prepared for cooking, as well as certain veggies. Both of these spray should be able to kill the Ecoli bacteria and Salmomilla bacteria.
But Chocolate Mouse, I think that your best bet IS to get the plastic one(s), because the 2 sprays that I mentioned above can help keep bacteria and germs at bay while you prep the food, and you might also wish to look into getting maybe a few in different colors so that you can know which one to use for which food.
Then when you're done, you can say goodbye to the germs and bacteria for good because you can just pop them into the dishwasher.
You wouldn't want to cut veggies or fruit on the same board that you've cut meat on. The plastic ones are also, like you said, machine washable.
Glass might be ok, but in addition to it possibly breaking, it has also been said to dull the knives.
Wood is good, but over time, even the hand washings can eventually cause it to warp and lose its natural look. But it CAN be sprayed with a mild sanitizer. The best wooden one to get, I think, is the maple ones. They can be sanded and resoak with mineral oil.
I hope this helps you.
