This website tested 5 ways:
https://www.prevention.com/food/keep-salad-greens-from-wilting/slide/1
The two successful methods were paper towel lined bowl with changing the paper towel on a daily basis or wash, spin dry, and store the entire salad spinner in the fridge.
I usually use the paper towel method but I don’t change it everyday. I wonder if going the complete opposite direction would work - keep the lettuce completely submerged in a bowl of water inside the fridge.
