When it comes to checking if a sweet potato has gone bad, there are a few things to look out for. First, give it a visual inspection - if it's developed any mold, it's time to say goodbye. You should also check for any soft or mushy spots, as these can be a sign of spoilage.
If your sweet potato passes the visual test, it's time to give it a sniff test. If it smells sour or unpleasant, it's likely gone bad. And, trust me, your nose will know - it's a pretty distinctive smell! On the other hand, if it smells sweet and earthy, it's probably still good to eat.
Now, I know what you're thinking - "what about the skin?". Well, if the skin is still firm and intact, it's a good sign that the sweet potato is still fresh. But, if the skin is wrinkly or soft, it may be a sign that the sweet potato is past its prime.