My raisins and sultanas do, too. Never seem to cause any issues. It will be a "trace" amount, anyway. Something to stop them clumping together properly in the bag. But as I said, I make these all of the time with no issues. If I can make great tasting wine for about £8 for an Imperial 5 gallons, then I am going to do it. Haha I just use it as my general drinking wine, anyway. Other fruit wines and kits go into storage to age.