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Corked Wine: What to Do (and How to Be Sure)
Smells like wet cardboard? Here's how to tell if your wine is corked, what to do with the bottle, and how to get your money back. No jargon.
Corked Wine: What to Do (and How to Be Sure)
Short answer: if your wine smells like wet cardboard or a damp basement, it's probably corked. It won't hurt you, but the wine is done for. You have three options: take it back to the shop (you're within your rights), try the cling film trick if you're feeling scientific, or pour it away. What you shouldn't do is decant it and hope. That makes it worse.
What "corked" actually means
Quick myth-buster: it has nothing to do with bits of cork floating in your glass. That's just a clumsy corkscrew, and you can fish them out.
The real culprit is a molecule called TCA (2,4,6-trichloroanisole). It forms when fungi naturally present in cork or wood come into contact with chlorine compounds. It usually arrives via the cork — but it can also come from cellar timber, cleaning products, cardboard boxes or the air in a winery.
Two things worth knowing:
- It's absurdly potent. Trained tasters pick it up at around 1 to 2 nanograms per litre — parts per trillion. A 2005 study put the point at which ordinary consumers start rejecting a white wine at roughly 3 ng/L.
- It doesn't just smell bad — it switches your nose off. Research suggests TCA doesn't simply add a musty note: it suppresses the olfactory receptors themselves, which is why a lightly affected bottle can seem flat and characterless rather than obviously faulty.
How common is it, really?
Honestly? Nobody agrees, and the numbers depend heavily on who's counting. The cork industry generally puts the failure rate at 1 to 2 percent, while independent estimates in the mid-1990s were closer to 3 to 5 percent. Wine Spectator has tracked corky bottles in its Napa tastings since 2005, and the rate there fell from a 2007 peak of 9.5 percent to 3.7 percent by 2012. Wine Enthusiast's blind tastings have run in the 3.5 to 6 percent range.
What everyone does agree on: it's far less common than it was in the 1990s, thanks to better cork production and the rise of alternative closures.
Is corked wine dangerous?
No. The concentrations involved are minuscule and pose no health risk. You haven't poisoned anyone. You've just served them a sad glass of wine.
How to tell if wine is corked — without being a sommelier
1. Smell the cork, but don't over-read it. Contrary to what you'll see online, it isn't useless: a clear musty smell on the wine-soaked end is a genuine clue. But a stained or damp cork is completely normal. The verdict isn't decided here.
2. Pour a small glass and wait. This is the real test. As the wine opens up in the glass, its aromas develop — and so does the taint. Give it five to ten minutes. If it's corked, it won't improve. It gets louder.
3. Know the vocabulary. Wet cardboard, damp cellar, wet dog, dusty attic, old newspaper. If none of those images come to mind but the wine tastes flat, dull, stripped of fruit, be suspicious anyway — that's the sneaky version of the fault.
Practical tip: never judge a wine straight out of the fridge. Cold masks faults. Warm the glass in your hand before you decide.
Corked, or something else? The quick reference
Plenty of people say "corked" when they mean "this tastes odd". Here's how to tell them apart:
What you smell | The fault | Salvageable? |
|---|---|---|
Wet cardboard, damp cellar, mould | Cork taint (TCA) | No |
Bruised apple, walnut, browning colour | Oxidation | No, but drinkable |
Rotten egg, struck match, cabbage | Reduction | Yes — decant hard for 10 minutes |
Vinegar, nail polish remover | Volatile acidity | No |
Farmyard, sticking plaster | Brettanomyces | No, though some people like it |
Decanting only rescues a reduced wine. In every other case you're wasting your time.
What to do with a corked bottle: 4 options
1. Take it back — this is the right answer most of the time
Bring the bottle (with the remaining wine in it), the cork and your receipt. Restaurants and wine shops replace corked bottles as a matter of course, and they're reimbursed by their supplier, so don't feel awkward about it.
In the UK, you're also covered by law: under the Consumer Rights Act 2015, goods must be of satisfactory quality, fit for purpose and as described, and a consumer can reject a faulty product within 30 days for a refund. A tainted bottle is not of satisfactory quality. The phrase to use is that you're rejecting the item under the Consumer Rights Act because it isn't of satisfactory quality.
2. Try the cling film trick (for the curious)
Not an urban legend. Researchers at the ISVV in Bordeaux put food-grade plastic film in contact with a contaminated red wine: after eight hours, TCA levels had dropped by 47 to 57 percent in two of three barrels, and by 74 to 82 percent after 24 to 48 hours. The catch: the film also absorbs some of the ethyl esters behind the wine's fruity notes, and the technique isn't permitted under the international oenological codex, so it can't be used commercially.
Being straight with you: a scrap of cling film and half an hour at your kitchen table won't reproduce lab conditions. Worth trying on a bottle you were going to pour away anyway — not on the one for tonight's dinner.
3. Cook with it? Probably not
TCA doesn't politely evaporate in a hot pan. With a clear fault, you'll just move the wet cardboard into your stew. With a very faint one, maybe, for deglazing. Don't force it.
4. Let the price decide
On a £8–15 bottle, a trip back to your local wine shop is worth it; a formal letter isn't. On anything over £40, push — once the fault is established, you're entitled to a replacement or a refund.
How to reduce the risk
- A screwcap isn't a cast-iron guarantee. The cork-related risk is effectively zero, but contamination can also come from cellar timber, crates and cardboard — so wines under screwcap or synthetic closures can occasionally be affected too. It's rare.
- Store bottles on their side, cool, away from light. This doesn't prevent TCA (it's either in the bottle from day one or it isn't), but it spares you every other fault.
- Keep the receipt for anything over £20. Dull advice, reliably useful.
And if you'd rather drink a bottle where ageing never enters the conversation: the three U'Weini cuvées (Bordeaux Supérieur red 2022, dry Bordeaux white 2024, Côtes de Provence rosé 2025) are €14.90 — made to be opened now, not to sleep in a cellar for a decade. Serve the red at 15–17 °C; any warmer and the alcohol takes over.
Please drink responsibly.
FAQ: corked wine
Is corked wine safe to drink?▼
Yes. TCA concentrations are tiny and pose no health risk. It's a flavour fault, not a safety issue.
How can I tell if a wine is corked as a beginner?▼
Pour a small glass, wait five to ten minutes, then smell. If wet cardboard or damp cellar notes get stronger, it's corked. If the wine has no aroma at all, be suspicious too.
Can decanting remove cork taint?▼
No. Aeration amplifies the fault rather than removing it. Decanting rescues a reduced wine (egg or struck-match smells), not a corked one.
Does the cling film trick actually work?▼
The principle is scientifically supported by ISVV research in Bordeaux, but with film surfaces and contact times far beyond anything you can replicate at home. Results in your kitchen: unpredictable, and at the cost of some fruit.
Can I get a refund for a corked bottle?▼
Yes. In the UK the Consumer Rights Act 2015 covers faulty goods, and in practice most retailers and restaurants replace the bottle without argument. Bring it back promptly with the cork and the receipt.
Can a screwcap wine be corked?▼
Rarely, but yes — TCA can originate in the winery environment rather than in the cork itself.
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