A common question we get is how should I remove a red wine stain?  By understanding that red wine contains tannins and different acids will aid in the removal of these stains.  Tannin is a natural occurring vegetable dye found in many plants, especially grape skins and, it is these different food acids that have the potential to affect the color in a carpet or upholstery.  Acids are very important structural components of wine.  If a wine is too low in acid, it tastes...