how to store lettuce long term
âD.L., Elm Mott, Texas. Iceberg lettuce should be washed before storing. First, remove the core by grasping the head in your hand and hitting the core area against the countertop; lift out the core. Rinse the head under running water and drain core side down in a colander. Dry thoroughly with paper towels or in a salad spinner. Wrap lettuce in dry paper towels and place in a resealable plastic bag, removing as much air as possible. Store in the refrigerator.