Grrrr. I was so excited to see the kiln opening this morning to see the large lentil beads that Scott had made the night before. There was about 9 gorgeous beads. THEY WERE ALL CRACKED!! We had this problem a few time recently and thought it might be the kiln, so Scott tried a few things and it seemed to be working fine. Scott called Craig at Arrow Springs and he suggested some things to try for testing glass compatibility issues. A black glass we received recently turned out to be the culprit. It is supposed to be compatible with Effetre, but it failed the tests by a long shot. Scott will post some of the info he learned here and some pictures regarding this issue. So sad. What a waste of time and money. Oh well, what can you do. We learned a great way to test glass compatibility and we're glad that the problem was not with the kiln. We'll be back on eBay on a regular basis now. We would have had more up by now, but now you see why.