Celebrating being over half-way done with canning squash. 54 quarts so far, along with several meals featuring squash along the way. I've lost 3 other quarts to jars breaking. Also, something weird...one jar blew it's lid in the canner. I heard a noise about half way through the process and wondered what was going on. When I opened the canner the lid was sitting on top of one of the other jars and the ring was in the water. I have no idea what happened. The jar was intact. Guess maybe I didn't tighten it enough, but normally I make sure they are tight. That's the first time that has ever happened to me. Like the saying goes...there's a first time for everything.