You want to avoid this whole drama. I get it. Here’s the secret: dry lettuce lasts longer.
Moisture is the enemy. If you wash lettuce before storing it, dry it completely. Use a salad spinner or pat it with paper towels.
Store it in a container with paper towels on top and bottom. The paper towels act like sponges for the evil moisture. Change them every couple of days if you’re fancy.
And for the love of all things crunchy, keep it away from apples and bananas. Those fruits release ethylene gas, which turns your lettuce into mush overnight. It’s a brutal betrayal.