First of all I can not stress enough that you should always wash your vegetables! They are just loaded with pesticides that you do not want to be feeding your family and loved ones. Here is a great tip for that huge picnic you are throwing. If you are in charge of making all the salads and need to wash 6 or 7 heads of lettuce….put them in a pillow case and throw it in the washing machine – my mom did this once and it really cleaned them!! Sounds weird but it worked!