Controlling the humidity in your vegetable crisper drawers

High humidity 

Generally, you'll want to use a high setting for leafy-green vegetables, anything that might wilt, or foods that are sensitive to moisture loss. As a rule, you should use this setting for items that are kept under water spritzers at the supermarket.

Some examples include: broccoli, Brussels sprouts, lettuce, cucumbers, peppers, carrots, strawberries, and herbs. 

Low humidity

Some produce are not as sensitive to moisture loss, however, they do expel large amounts of ethylene gases. When those gases escape, some produce could rot prematurely.

Some examples include: apples, pears, mangoes, papayas, cantaloupes, and avocados.