Let's say one day you bring your lunch, which is either potato salad or pasta salad or some kind of a rice and bean dish, to work in a nice reusable plastic container. Then say you eat your lunch but you never rinse out the container because you are just going to wash it when you get home. But only you forget and leave it in your car.
For two weeks.
When you find the container, you notice that there is something growing in it that does not resemble rice or potato or pasta. Do you just throw the container out? Or do you clean it and reuse it? What do you clean it with?