popped corks of bottled bought wine

[Kentuckyhomebrewer]

I drink wine everyday with dinner and before I started brewing I used to drink Carlo Rossi Sweet red. Now I only drink my own stuff, but when I have company who aren't adventurous to drink homebrew I still serve it. I bought a jug and siphoned it into the same bottles I use for my own stuff so I could serve it by the bottle. they were fine for a month but over the last month 3 out of 4 bottles have shot their corks and made a mess on my basement floor. None of the stuff I brewed have done this even after several months. Any idea why this would happen with store bought wine? I could see if it was my stuff and I hadn't stopped the fermentation enough.

 

[Johnd]

You mustn’t have sanitized the bottles / corks properly, otherwise the sugar in the wine wouldn’t have started to ferment.

 

[Kentuckyhomebrewer]

That's what I thought. I did but I guess not well enough. thanks.