Name a way you can tell carton of milk has gone bad?

One common way to tell if a carton of milk has gone bad is to check the expiration date. If the milk has passed its expiration date, it is generally not safe to consume and should be discarded. Another way to tell if milk has spoiled is to smell it. If the milk has a sour or unpleasant odor, it has likely gone bad and should not be consumed. Additionally, spoiled milk may have a curdled or chunky appearance. If the milk looks different from its normal smooth texture, it is best to discard it.