Just finished my 36" "igloo", waited ~2 weeks, maintained a small fire for ~1/2 day. The next day, ran a little bigger fire 4-500 degrees or so, and noticed some cracking. This theme continued, more fires, more cracks. I think it may be done cracking now, but I'm a bit worried about lighting pizza-able fire. My questions are: 1. Is there anything I can/should do about the cracks? 2. What precautions, if any, should I take when using it this winter (I'm in MN, where -20 isn't unusual). Please advise, -Thanks
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