I’m no chemist, but I’m going to guess that your QV had a high BA content to begin with. Anyway we’re beating a dead horse here. It does happen and now you know in case it ever happens to you and more importantly our thread-starter (Microman) can save his investment. All gear is susceptible to crashing. Some brands more than others. I’ve even had human grade gear crystallize on me when I stored it in my basement over the winter.