I made a second batch of honey mead, O.G. 1.112 and after 2 weeks specific gravity was at 1.000. At this time I racked it into a glass carboy with cork and airlock. After 1 month I re-racked into another glass jug in an attempt to make it clearer. I let it set for another month in the jug with cork and airlock, and now it has a slight green cast and tastes more sour than the previous batch. I am assuming some contamination has occurred. Any thoughts?