Storing red wine vinegar?

[NonDomestic]

Do you have to store red wine vinegar or worcestershire sauce in the fridge?

[Liveans]

Vinegar is indeed a product of wine that has gone bad. In fact the word "vinegar" is from the French words vin aigre which translates to "sour wine."
The surprising news is that vinegar does indeed go bad. Since it is created from alcohol, many of the essential elements that give vinegar its flavor are prone to evaporation.

A significant amount of these components typically are gone by about six months after a bottle of vinegar is opened, and most vinegars are tasteless after a year of sitting opened. Vinegar's flavor can be preserved if it is stored properly in a cool dark place or in a refrigerator.

Some vinegars, if stored improperly or too long, will develop a cloudy look. This cloudy substance (called "mother of vinegar" since it can be used to make more vinegar) can be filtered out with a paper coffee filter in order to salvage the vinegar. However, if either the mother or the vinegar smells bad or rotten, discard both immediately.

[Cinnie]

I store mine in the fridge. I know people who don't. If you don't use them frequently I'd keep 'em in the fridge.