What happened to the wine stopper?
Do you have this bottle of dry wine or liqueur? If it's sweet wine, it probably ferment and start again in the bottle, so it produces gas, which causes the plug
He probably was not inverted or horizontally, that is not up to the cork wine. If so, plus the temperature in recent days is relatively high, so down, will produce the first floor of the problem.
It's supposed to be a conservation problem. The weather is too hot or too dry. The wine bottle shrinks, the air goes in, the germs multiply, and the air expands and expands the bottle
Wine itself may be the problem of sterilization is not complete, or did not go through the fermentation of apple milk, when the environment is appropriate, began to move in the bottle, producing gas, causing plug
Filling capacity is slightly more, the remaining space is relatively small, the weather is hot, causing gas to expand, plug the top out
