It's very important to wash all produce even if it's organic. Washing your fruits and vegetables with plain water is not enough to get rid of the residue and other nasty things that linger.
I use 1 part water and 1 part vinegar in a bowl. You can also pour the mixture into a spray bottle for convenience.
Let the produce soak in the mixture for a few minutes. The vinegar kills bacteria sits on the surface of the produce and helps them get squeaky clean. Vinegar also helps berries from spoiling quickly.
Once the produce has soaked for a few minutes, remove from the mixture and place them in a colander. Rinse thoroughly.
I did the same with organic grapes.