![]() ![]() Sadly, nothing can help make a wine with this flaw taste better. Tastes like chemicals: A flawed fermentation can give off a strong paint thinner or acetone scent.If it doesn’t, you can add something copper to your glass (such as a pre-1982 penny), which reacts with sulfur compounds and can magically eliminate the stinky smell. Fortunately, this flaw often disappears shortly after the wine is opened. These wines are said to be “reduced,” meaning it was fermented without enough oxygen. There’s no mistaking this flaw, even if you’ve never smelled a rotten egg. Smells of rotten eggs, onions, cabbage: Wines that got too little oxygen during the winemaking process can develop volatile sulfur compounds, including ones called mercaptans.If present in a barrel or winery equipment, entire lots of wine can be affected– meaning the cork is not always the culprit. Even in minute amounts (as in parts per trillion), it can affect the way a wine smells and tastes. TCA stands for 2,4,6-Trichloroanisole, which is a harmless, potent-smelling compound that most often occurs when chlorine-based cleaners come into contact with wood. Has a damp basement, moldy cardboard, or wet dog odor: A sign of TCA contamination, aka “cork taint”.But rogue yeasts can create this flaw in the winery. Has a strong vinegar quality: This is the smell of volatile acidity and acetic acid, which usually develops in wine after exposure to oxygen.Tastes like sauerkraut: Lactic acid bacteria gone wild gives this nose-wrinkling smell. ![]() ![]() Left unchecked, wine becomes undrinkable. Smells like barnyard, sweaty horse, Band-Aids or manure: Brettanomyces, aka “Brett”, in sommelier shorthand, is a bacteria that, in small doses, is not necessarily unpleasant.Each of these issues has specific signs to look for, which makes it easier to tell a wine that’s gone bad from a wine that’s just not to your taste. Poor bottling, microbial contamination and storage problems are just the beginning. There are lots of reasons a wine can go bad. People want to know, why does wine go bad, how do you know if a wine has gone bad, and can you do anything to prevent it? Why Does Wine Go Bad? One of the most common questions that I get from students in my Introduction to Wine classes is about bad wine. Why Does Wine Go Bad and How Long Opened Wine Lasts ![]()
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