OK, so we have had this insert 2months now I did the small fire break in, let it cool and gradually increased fires, did a good cleaning after all that to check for any abnormalities. None. The installer told me to do small fires to draw the moisture out of the bricks so they won't break. So that is what I did. And now the temps around here this weekend are near 70, so I clean the insert out and ???###@@@ The very 1st brick on the left side nearest the door is cracked in 2 about middle ways up!! Now, I need to know if I should worry about this and buy a set from somewhere just in case this happens again, or wait till spring and see if any other do the same thing. Or not even worry because it is a clean break and is in the front of the insert and is staying together right now. Wonder how this could have happened? I load mostly n/s, and if anything, I would have thought the ones in the back and on the floor would have broke being that they are the ones receiving the most abuse. I have posted here before stating that my bricks seem pinkish around the edges and still do especially the broken one. Wonder if the bricks were not made or cured properly. Anybody know if there are bricks out there that are nearly indestructable? And where could I purchase these to replace, other than the dealer?? Thanks to all in advance!!