how to wash blueberries under cold water
After discarding any berries that show even a bit of mold, put 3 cups cold water and 1 cup white vinegar in a large bowl or salad spinner. Make a solution of 1 part white vinegar to 3 parts cold water. Immerse berries and swish around for about a minute. Washing blueberries in the vinegar water bath. Drain berries, then rinse with clean, cold water until any trace of vinegar aroma or taste is gone. Rinse the blueberries in cold water. Spread out rinsed berries on clean cloth or paper towels, and pat and roll lightly with towels to dry them well. Drying off washed and rinsed berries.