Just got off the phone with someone at Tattler and she told me that I'm probably tightening the bands TOO TIGHT initially, before placing the jars in the canner. Written and website instructions say to tighten them hand tight, then back the bands off by 1/4 inch. What I was told today is the best way is to set the jars on the table and screw the bands onto them, without holding onto the jar at all. When the jar begins to turn with the band, it's tight enough to put in the pot. The person at Tattler insisted that I
should not let the canner sit more than five minutes after depressurizing, and to tighten the bands immediately upon removing the jars, whether I see boiling in the jars or not. So I've got a new tactic to try.....