I have often noticed, prominently displayed in the fresh fruit and veg aisles at Sainsburys, signs instructing me to wash all fresh produce before use. The same on a box of Easy Peelers that I have just squashed for recycling. I would always wash items with edible skin, such as apples, tomatoes etc. But is it really necessary for food items that will be peeled before consumption? Do you wash things like oranges and onions, for example?