Towel Off. Largely agreed upon as the most essential salad saving trick, simply slip a piece of paper towel in with your bag of greens, which will wick away moisture, and prevent spoilage. That said, a soggy towel seriously hampers efficiency — make sure to check it often, and replace it if it gets too damp.
Step 1 of keeping lettuce fresh – open the package of lettuce greens. Step 2 of keeping lettuce fresh – put the paper towel on top of the salad greens: Step 3 of keeping lettuce fresh – close the salad greens package and put it in the refrigerator. Don’t forget to change the paper towel every day, and you packaged salad greens will stay fresh