I'm cooking egg rolls and my egg roll wraps smell sour. They say they expire in 2 days. Are they still okay to use?
The dates provided on packaging are not precise. They make excellent guides but too many factors can alter the timeline (as mentioned by @Joe, being mishandled in the market or being previously opened among other things).
As a general rule, if something smells unusual and off, it probably is. I would personally throw them out.