10 Wine Faults Every Wine Lover Should Know (Without Becoming a Sommelier)

You open a bottle you’ve been excited about all week. You pour a glass. You swirl it confidently like you saw in a movie. And then…

It smells like wet cardboard. Or boiled eggs. Or a horse stable in August.

So now the question is:

Is this “complexity”… or is your wine actually bad?

The truth is, not every strange smell in wine is intentional. Some aromas are signs that something went wrong during production, storage, transportation, or aging. The good news? You don’t need a wine degree to recognize them.

Here’s an easy guide to the most common wine faults and what your nose is trying to tell you.

1. Oxidized Wine — “Why Does This Taste Like Old Apples?”

Oxidation happens when wine has too much contact with oxygen, heat, or light over time.

White wines often lose their freshness and turn darker yellow or amber. Red wines may start smelling slightly vinegary or tired, while the taste can remind you of caramelized apples or stale nuts.

Common smells:

• Bruised apple

• Sherry-like aromas

• Nuts

• Vinegar

• Flat fruit

A simple experiment: leave a glass of wine out for two days and smell it again. That’s oxidation in action.

Unfortunately, once a wine is oxidized, there’s no real fix. At that point, it’s better for cooking than drinking.

2. Corked Wine — The Famous “Wet Cardboard” Smell

This is one of the most common wine faults, caused by a compound called TCA (Trichloroanisole).

People often describe it as:

• Wet cardboard

• Moldy basement

• Damp newspaper

• Wet dog

The biggest clue?
The wine smells muted. It has no life, no fruit, no aroma. TCA basically erases the wine’s personality.

And no — letting it “breathe” won’t help.

If a bottle is corked, it should be replaced.

3. Sulfur Smell — Rotten Eggs in Your Glass

Sometimes wine smells like:

• Rotten eggs

• Burnt matches

• Cabbage

• Onion

This is called reduction, and it usually comes from sulfur compounds developing in low-oxygen environments.

The good news? Unlike oxidation, this one can sometimes disappear.

Try this first:

• Swirl the wine aggressively

• Decant it

• Give it 10–15 minutes of air

Many reduced wines open up beautifully after some oxygen.

4. “Why Is My Still Wine Fizzy?”

If a non-sparkling wine suddenly feels lightly fizzy, it may have started fermenting again inside the bottle.

This is called refermentation.

Sometimes it’s intentional (like in certain Italian styles), but when it isn’t, it usually means leftover sugars and yeast restarted fermentation.

Signs:

• Tiny bubbles

• Yeasty smell

• Slight prickling on the tongue

Not always dangerous — but definitely not always desirable.

5. Heat Damage — The “Cooked Wine” Problem

Wine hates heat.

Even a few hot days in a garage, delivery truck, or sunny kitchen can damage a bottle permanently.

Signs of heat-damaged wine:

• Jammy or stewed fruit aromas

• Nutty or caramel notes

• Raised cork

• Wine leakage around the capsule

It tastes tired, heavy, and cooked instead of fresh and vibrant.

This is why proper storage matters more than most people realize.

6. Light Damage — Yes, Sunlight Can Ruin Wine

In the U.S., this is often called lightstrike.

UV light can damage wine, especially delicate white wines in clear bottles.

Typical smell:

• Wet wool

• Damp fabric

• Skunky aromas

And sadly, there’s no fixing it.

That beautiful sunny window display?
Great for Instagram. Terrible for wine.

7. Brettanomyces — The “Barnyard” Debate

Ah yes… Brett.

Some wine lovers adore it. Others absolutely hate it.

Brettanomyces is a yeast that can create aromas like:

• Horse stable

• Leather

• Sweat

• Farmyard

• Metallic finish

In tiny amounts, some people find it adds rustic complexity. Too much, and the wine smells like a saddle after a rainstorm.

This fault has become more common as warmer vintages create riper grapes with lower acidity.

8. Vinegar Smell — When Wine Turns Toward Aceto

A small amount of volatile acidity can add character and lift to wine.

Too much?
Your wine starts smelling like balsamic vinegar.

This usually comes from excessive acetic acid during winemaking and is often linked to overripe grapes or poor fermentation management.

If the vinegar smell dominates the glass, the wine is flawed.

9. Tiny Crystals in Wine — Don’t Panic

Ever seen little crystals floating in a bottle or sitting at the bottom?

Good news: those are usually tartrates, natural mineral crystals from the wine.

They may look strange, but they’re completely harmless.

Think of them as “wine diamonds.”

Many unfiltered wines naturally develop them over time.

10. Sometimes the Wine Isn’t Bad… It’s Just Too Young

Here’s something many consumers never hear:

A lot of wines are opened far too early.

Many white wines — especially serious wines like:

• Fiano

• Riesling

• Verdicchio

• Timorasso

• Greco

• Chardonnay

need time in bottle before they truly shine.

Freshly bottled wines can feel closed, muted, sharp, or awkward. After months (or years), they become deeper, smoother, more expressive, and far more complex.

The modern wine market pushes wines out fast because restaurants, distributors, and retailers all need quick turnover.

But wine was never meant to be rushed.

Sometimes what people think is a “bad wine” is actually just a wine that hasn’t had enough time yet.

Final Sip

Wine is alive.

It changes with oxygen, temperature, light, age, storage, transport, and time. Some strange aromas are beautiful signs of evolution. Others are warning signs that something went wrong.

The important thing is not memorizing fancy terminology.

It’s learning to trust your senses.

If a wine smells fresh, vibrant, balanced and alive, enjoy it.

If it smells like wet dog, vinegar, boiled cabbage, or a horse stable… maybe don’t force yourself to pretend it’s “art.”

Sometimes a bad bottle is just a bad bottle. 🍷

JOIN OUR BIGGEST WINE TASTING OF THE YEAR

You can find tickets here: ABOVE WINES EXPO TICKETS

Your ticket includes:

✔️ Entrance to the 5th Anniversary EXPO
✔️ Unlimited access to all featured Italian wines
✔️ All curated Italian food offerings from Ari’s Pantry throughout the event
✔️ A crystal wine glass to take home
✔️ An Above Wines branded pouch to carry your glass in style

No tokens. No upsells. No hidden extras.

Just wine, food, conversation and authentic Italian hospitality.

Throughout the afternoon you’ll experience:

🍇 Rare, small-production Italian wines from family-owned wineries
🗺️ Exploration of multiple Italian regions from north to south
💬 Real conversations with Italians about terroir, culture and traditions
🍽️ Fantastic Italian dishes curated to complement the wines
🥂 A relaxed atmosphere designed for connection, not rushing

For one afternoon, we want Grapevine to feel like one of those Italian Sundays I grew up with.

The kind where the table is full.
The wine keeps pouring.
And nobody wants the day to end.

See you Sunday, May 31st.

— Aldo 🍷

A little final note from me…

If you want to live a little more like us Italians, this is the moment when rosé season officially begins.

But I’m talking about real rosé.

Not the overly sweet, fruit-punch “Kool-Aid style” rosés that unfortunately became popular here in the USA over the years.

Great rosé should smell like summer. Fresh flowers, wild strawberries, Mediterranean herbs, sea breeze. It should be dry, elegant, refreshing and alive, with just enough acidity and minerality to accompany long lunches, seafood dinners and warm evenings outside with friends.

This is exactly the kind of rosé we drink in Italy during this season.

So to celebrate the beginning of summer, we created a small special selection with free shipping featuring some of our favorite rosés from Amalfi, Calabria and Puglia — wines that truly capture the feeling of southern Italy in a glass.

Because honestly… this is the time of year when a cold bottle of rosato belongs on every table. 🍷☀️

Try the Wine, 24hr Shipping:

Italian Quality Rose SPECIAL SELECTION - 6 Bottles

That’s exactly what I’ve been thinking about as we prepare for the

Above Wines Expo 2026

For me, it’s not just another event.

It’s a way to bring all of this, these places, these producers, these stories—into one room here in Texas. To let people taste what I’ve tasted, and maybe see Italian wine a little differently after. If you’ve ever been curious to go beyond the usual bottles…
this is where it starts.

You can find tickets here: ABOVE WINES EXPO TICKETS

Tonight, I’ll probably open something simple. Maybe from the south.
Something that reminds me why I started doing this in the first place.