Occasionally, a bottle of wine may be contaminated by a fungus-infected cork. This can result in what is referred to as “corky” wine, or “corked” wine. This situation is somewhat prevalent, with some experts estimating that as many as 5% to 10% of wines having this problem. Screw caps and synthetic corks would prevent this problem, and much of the industry is headed in that direction. Corked wine will have a musty, moldy smell and taste, somewhat like wet cardboard or mushrooms, and should be returned to the place of purchase for a refund.