Hi everyone! I have a question about my eggs. They are very hard shelled, and are totally fine in all other aspects, but when I hard boil them, it seems that most of them gets these splitting cracks (like lightning looking) all over a few seconds or so after I put them into the water to hard boil them. I make sure each one isn't cracked at all before I put them in and I slowly submerge them into the water so it's not that they are cracking from hitting the pan. I don't get why this is. I have never had this problem with store bought eggs....