Grapevine, Texas – September 16, 2026 -- A musty, sharp, or oddly muted glass of wine may not be a matter of taste but a sign of an actual flaw in the bottle. Bob Landon, known as "Mr. Wine of Texas" and affiliated with Landon Winery and Red Dirt Cellars, breaks down the most common wine faults so drinkers can tell a flawed bottle from simple personal preference.
Cork taint leaves a musty, wet-cardboard smell that never improves
The compound TCA, which affects natural cork, is the most familiar wine fault. It produces an aroma similar to a damp basement, suppressing fruit and leaving the wine feeling flat. Landon notes that once this scent appears, it typically does not fade with time in the glass, even though the wine remains safe to drink.
Too much air turns whites tea-colored and reds dull
Oxidation happens when a wine is exposed to excess oxygen before opening, whether from a faulty seal, bottling issue, or winery error. The result is softened structure, browning or amber color shifts, and flavors resembling bruised apple or stale nuts. Some styles use oxidation intentionally, but unwanted exposure strips away freshness and balance.
Burnt-match and cabbage smells point to sulfur imbalance
Excess sulfur, common in winemaking but sometimes overused, can create sharp aromas resembling burnt matches; a swirl sometimes helps release these compounds. Reduction, caused by too little oxygen exposure during production, produces notes of rubber, onion, or cooked cabbage. Both faults mask fruit and disrupt the wine's intended character.
A nail-polish edge signals volatile acidity or heat damage
Volatile acidity (VA) adds a vinegary, nail-polish-remover edge that overwhelms fruit when levels run high, often pointing to unwanted bacterial activity. Heat-damaged bottles show similar issues, sometimes with slight leaking or sticky residue under the capsule, and the wine inside tastes stewed with cooked fruit and little definition.
A wine with almost no scent may be a warning sign, not a subtle style
When a wine that should be lively shows barely any aroma, it may have suffered poor storage or mild contamination. A taste typically confirms the problem, revealing a thin or unbalanced profile rather than intentional subtlety.
Landon points out that retailers and restaurants recognize these issues occur and will often replace a flawed bottle. Learning to identify these faults, he says, helps drinkers trust their own senses and get more enjoyment from properly handled wine.