I just tried to make a 30 bottle wine kit (similar to this one: http://www.wilko.com/home-brew/wilko-chardonnay-wine-30-bottle-kit/invt/0323178?VBMST=wine 30 bottle). I followed the instructions perfectly, added 3.5kg sugar to 2lt boiling water and waited until it was completely dissolved, mixed it with the contents of the can, and added water up to 23lt and went to measure with my hydrometer but it says the potential alcohol is only 8%! Any ideas why? I'm sure that the sugar was dissolved in the cooking pot when I mixed it, but is it possible it separated or something? Not sure now if I should add more sugar or just make it as it is.