So, how do you know if your shredded cheese has gone bad? Well, it's pretty simple, just use your senses. If it smells off, or has an unpleasant odor, it's time to say goodbye. If it's developed an unusual texture, like it's become too dry or too wet, it's also a sign that it's past its prime.
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Another way to check is to look for mold or slime on the surface of the cheese. If you notice any of these signs, it's best to err on the side of caution and throw it away. You don't want to risk getting sick from eating spoiled cheese, trust me, it's not worth it.