Plastic cutting boards can become stained over time. This is a guide about cleaning plastic cutting boards.
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Use a fresh lemon to remove stains from a plastic cutting board. Squeeze the juice from one lemon on the cutting board and allow it to sit for 30 minutes to 1 hour, then rinse.
I have a large, old cutting board made of a heavy white material (sort of a polymer plastic). It was extremely discolored & I was going to toss it out. I tried all kinds of things to get it clean, including putting it into the dishwasher. Nothing worked. As a last resort I filled my kitchen sink with hot water & added bleach & let the board soak for a few hours. Ole! It looks brand new.
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Here are questions related to Cleaning Plastic Cutting Boards.
I can see the lemon cleaning the stain; but it seems the bleach will disinfect it better. Does soaking it "for hours" make it less useable with food?
By Marty Dick  08/07/2015
The bleach won't soak into the plastic since the plastic isn't porous. It will wash away with water. A wood cutting board will take on odors and flavors because of the porous surface of the wood.
My mother has a cutting board. It is made of a type of white hard plastic. Over the years knives have cut into the surface and now those areas have darkened. My mother believes this is mold and has tried cleaning the board with bleach to no avail. Does anyone have any suggestions?
By Suntydt from Tazewell, TN
By Sashina C. 08/31/2013
Yes, first bleach it for an hour or so. Then soak it in vinegar and salt. To remover the black smell. Safer also. Then soak once a week in the cheapest white vinegar you can find.