I fused a wonderful plate yesterday, 5 x 5, three layers thick. I am quite sure that I fired too fast for this item as I now have a huge bubble on top of one of the edges. It must be a half inch high. Anyway, I am wondering what will happen if I refuse it at a lower rate. Might the bubble go away or at least flatten out? I really like the piece and would like to salvage it somehow. Thanks. I used Spectrum 96 but used a faster schedule as I also had some jewelry in there that did fine. Any advice would be appreciated.