Why has my champagne lost its bubbles?

When a glass of champagne is poured, the bubbles are lovely to look at. Champagne contains carbon dioxide, as well as tiny particles of dust in the glass. Why does champagne lose its sparkle? Has it gone off? Has it gone bad?

Someone has cleaned the bottle too thoroughly.

Champagne, as its name suggests, is a sparkling wine. The fizz in most non-alcoholic drinks is produced by carbon dioxide (CO₂), and champagne uses the CO₂ naturally formed during the alcoholic fermentation of the sugar in the grape juice, which has been fermented by yeast. The bottles are then sealed so that the CO2 generated does not escape, which increases the concentration of CO2 in the champagne.

If your champagne isn’t as fizzy as you’d expect, it’s because the glass is too clean. The bottle contains impurities that help the CO2 bubbles linger longer, resulting in a more consistent fizz. CO₂ is released on contact with the micro-limestone contained in the dirt inside a glass. The fizz in the champagne increases, so if you don’t want to waste your champagne, use another glass without washing it.
If your champagne is older than its best-before date, it may not be safe to drink.

A loss of fizz in champagne may be due to the drink having passed its use-by date or to poor storage. How can you tell?

If champagne isn’t stored correctly, the CO₂ will dissolve into the liquid and the champagne won’t be fizzy enough. If the champagne isn’t fizzy, here’s another reason.
The darker the colour, the more oxidation has taken place, and the golden colour turns more yellow.
If you leave the champagne to stand for too long, not only does the carbonation disappear, but the fresh aromas disappear too. All that remains is the aroma the champagne has acquired as it has aged. You’ve waited too long to drink it, and now it’s gone off.
Champagne that has lost its carbonation tastes less acidic on the palate. It would feel like drinking flat juice with no sparkle at all.

Keep your champagne sparkling by preserving the bubbles.

To keep the champagne’s bubbles strong, pour the champagne into a slender glass that is slightly wider at the top.

The glass should not be rinsed before serving, as rinsing would remove the tiny impurities from the glass. These impurities are not good to have in your glass and cause the gas to become trapped inside the glass, creating bubbles.

The cooler the champagne is when served, the more effervescent it will be.

Keep your champagne chilled by using a stopper.

Professionals use champagne towers to preserve the bubbles in champagne for a long time. This method is used alongside other preservation techniques to maintain the quality of the champagne.

If your champagne has lost its bubbles and you wish to reuse it, you can turn it into vinegar. You can also use champagne that has lost its bubbles in other recipes.