I have been canning for years. This is the first time I lost all my beans. I prepared them as usual. Did the water bath canner for 30 minutes, all the jars did the ping thing when I took them out and a week later everything was unsealed and working. What went wrong? Could the beans have been too old or the lids not any good? I always use new lids and make sure they are hot when put on the jars.