Hello, my crack has been working wonderfully for almost a month now but started having trouble this morning. It was running perfect for about 15 minutes and then just faded out. Neither of the tubes were glowing at that point, and all input was double checked and was good. I waited about 30 minutes, and tried again. It ran perfectly again for about 15 minutes, and then shut down. I'm kinda at a loss as to what's going on. Any help would be greatly appreciated. Thanks in advance.