I have a finished wheat beer that's have been storing post secondary at about 70 degrees in a dark room for about a week till I have an open keg. It seems to have developed a dark (blackish) haze on top of the beer about and inch thick. Any clues? It doesn't have a off smell or any type of bacteria growth.
It smells fine. The haze appears to have separated from the rest of the batch ( looks like a black and tan). The haze also moves with the beer if you rock it. Protein issue maybe?