School me on creating a way to keep lettuce longing in the fridge. I have been eating home made salads for the past couple of months for lunch everyday. So, on the weekends I will buy a big bag or sometimes the plastic box things with all kinds of lettuce mixed in them. The dates on the packages will read sell by at least 1 week and a half away. That tells me I should be able to eat the lettuce in that amount of time before it goes bad. Well, I am wrong in that assumption. The lettuce will be perfect for 2-3 days, then after that the smell comes and the lettuce is bad. I have the opened lettuce stored in the fridge in a ziplock bag. What the heck can I do to make it last longer than 3 days and it not turn bad on me. I hate having to go to the store mid week to pick up more lettuce. I get all my foods on Sunday night for the week and everything last but the stupid lettuce. What gives? How can I solve this problem and make it last the whole week?