I see a lot more cases of people using their EDC knives for cutting food than I expected. All well and good if your knife is up to the task, but how do you prevent contamination? If you keep a fixed blade in your sheath and it encounters various circumstances that leave it dirty and you can't wash it off before resheathing you're going to deposit those contaminants in the sheath and recontaminate the knife every time you put it away. So how do you go about cleaning your sheath? And what if it's one of the factory polyester models that the larger Beckers come with?