You can check the color and clarity of the wine, whether there is liquid seeping out of the wine bottle, whether there are snowflakes or sediments in the wine, whether the cork is bulging, and whether the wine has a strange smell. Identify the taste of wine.

1. If the color of the wine is dull, lackluster, and appears abnormally brown, it may be bad, or if the white wine appears dark yellow, it may also be bad;

2. If there is liquid seeping out of the wine bottle, air has entered the bottle, and the wine has been oxidized, it means that the bottle of wine has gone bad;

3. If there is a strange and unpleasant smell after opening the wine The taste also indicates that the wine has deteriorated;

4. When the wine has unknown sediment or hops, it may also be one of the reasons for the wine to deteriorate;

5. The cork bulges for no reason. This may be due to the high temperature of the wine, which causes the air pressure to increase and pushes the cork out;

6. If the wine tastes dull, it may mean that the wine is bad.