I have a plastic chopping board and it has food stains on it. I usually just bleach it every now and then and rinse/soak it before the next use. But I'm thinking there's gotta be a nicer way (for our health!) to do it. In the past I have tried just scrubbing like mad with hot water and leaving it on the window sill in the sun, but it doesn't work. Do you have any secrets to get my board clean??