Not sure where this originated but it makes sense and most of us have vinegar in the cupboard. This should also work really well for vegetables too.
Cleaning fruit – fill sink with water, add 1 C. vinegar, mix. Add all fruit and soak for 10 minutes. Water will be dirty and fruit will sparkle with no wax or dirty film. Great for Berries too–keeps them from molding. I do this with strawberries and they last for weeks!