Most pesticides can't be removed from produce with water alone because they are designed to be water resistant. This way, they won't wash off in the rain. Fruit & Veggie Soak Concentrate was designed for produce which requires soaking such as grapes, berries, broccoli, and spinach. This type of produce has more hidden crevices where contaminants can hide. This formula has no taste, is odourless, residue-free and helps remove surface pesticides, chemicals, bacteria, wax and dirt. For firm produce like apples and tomatoes, try Fruit & Veggie Spray Wash.