Originally Posted by
Eastbay1K
This is particularly an issue with the Costco packages. My theory (as this often occurs prior to the use-by date) is that these items have frequently been subjected to sub-freezing temps at points during transport/storage and the thaw makes those more tender leaves rot almost immediately.
Even the delicate lettuce (red leaf, oak leaf, baby red romaine) that i get at the farmer market rots sooner than sturdy lettuce. I always dry off my lettuce when I get home & put it in a metal bowl covered tightly with foil. Gets me a few more days.