I know that some of you have made the grape cooler from NT. I hand juiced a gallon of red grape juice and followed the directions to the "T". It's only been 48 hours, but I just checked on it and there is mold on the top and a very definite "winey" smell. I was making this for my kids, but I'm not about to give them red wine. Is it supposed to smell like this and have mold? HELP!