My refrigerator has two produce drawers. One drawer has an adjustable humidity control, and I'm not sure how it should be set to keep produce at it's freshest. Right now I have lettuce, salad mix, grapes and celery stored in it, and have it set to high. The lettuce seems to keep longer at that setting, but the celery goes limp in less than a week.
In the drawer without a control I have apples, carrots, onions.
What is the proper way to store produce?