I have a Wine Expert Chocolate Raspberry Port kit I bought about 15 months ago. When I first bought it I was told it would last a few years unmade. I pulled it out of the back of the closet under the stairs today and the grape extract (juice) bag is swollen to the point that it is ripping the box. Should I assume this has gone bad or is it okay. Any thoughts are welcome. Hate to toss $110. Thanks.