I find I’m often waging a losing battle in an effort to use up all my fresh salad greens before they wilt and turn slimy. I have found one trick that helps prolong the life span of salad greens. I fold-up a piece of paper towel, run it under cold water, wring it out, and chuck it in the bag or container of greens and then toss it in the crisper. I also recommend not purchasing the bagged salad greens at the grocery store. There’s no way to know how long it’s been since they were picked and they inevitably go off before the expiration date. If you can’t grow your own, get them from your local farmers’ market.