It is a spectacular habit to soak or wash your produce before you eat, because washing does remove a considerable amount of toxins from your fruits and veggies, especially when done with cold water. However, with such complex & concentrated chemical pesticides being used in large-scale agriculture today, is cleaning with just plain water a safe bet? Probably not.
More is better - when it comes to extra fries, maybe. But your laundry detergent? Absolutely not. Chances we are already using more than what we need to anyway. Not only are we washing away the dirt down the drain but also our money.