This source suggests vinegar is best:
“Previously, they (America’s Test Kitchen) tested vinegar to remove surface wax and pesticides but wondered about its efficacy in destroying bacteria. They tried four different methods to clean apples and pears and left one batch unwashed. Batches of fruit were rinsed under running cold water, scrubbed with a brush, washed with the vinegar solution and washed with antibacterial soap. They then took surface samples and grew the bacteria in petri dishes. The results were interesting.
Cold water rinse removed only 25% of the bacteria.
Scrubbing with a brush removed 85%.
The vinegar solution removed 98%.
They did not give the percentage for antibacterial soap but it was slightly better than the vinegar solution.”