The medical doctors did a seminar on how to be safe when eating. Number one item was never purchase food from a street cart. You are most likely to pick up something bad there. They informed us we should be washing our produce before we eat it and told us how to do it.
For each liter of water you use 2 tsp of bleach. It is 2 here because their bleach is not as strong as the bleach in the states. You bathe the produce for 1 minute then you can remove it.
I then rinse the produce using filtered water to remove the chlorine and let it air dry. I processed all the fruit I bought at the street fair. It is kind of a pain but as the Docs said, you can't be too careful.