Many people use vinegar to wash clothes, counters, or other surfaces naturally, but good, old-fashioned white vinegar is a great cleanser of fruits and vegetables with edible skins.
To clean these fruits and veggies, rinse well first with running water, using a clean veggie brush to remove loose dirt trapped in crevices of broccoli and similar plants (a toothbrush works well also).
Though studies have shown cleaning with vinegar reduces surface bacteria by 98%, (Source), far more than soap or water, remember that the remaining bacteria begin growing after cleansing. It is important to eat the fruit the same day as you wash it.