To judge whether a wine has deteriorated can be through these methods: 1, to see whether the wine has been oxidized.
If you smell a very pungent odor like vinegar, the taste changes from fresh to dry and bitter.
You can tell that the wine has been oxidized.
2. Check whether the wine is corked.
If you smell something similar to moldy cardboard, then you can preliminarily judge that the wine has a cork smell.
Then taste a dry feeling, that can be sure that the wine has a cork flavor.
3. Smell the wine for sulfide.
If a wine contains too much sulfide, it will smell like matchsticks or rotten eggs.
4. Identify whether the wine is cooked or not.
If a wine is stored in a warm or hot environment, the wine will develop a cooked taste, and the color of the wine is brown, and the smell of caramel indicates that the wine has gone bad.
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