Bypass the Jen-Ken program
I have a Jen-Ken, but bypass their settings in favor of Paul’s conservative firing schedules here on fusedglass.org.
I agree on the bubble squeeze…Jen-Ken’s is not giving you a bubble squeeze. I also go hotter than 1425 for my full fuse…usually up around 1465.
Also, if you’re talking with Jen-Ken, ask for Mike. I had a thermocouple issue with my kiln, and Mike was very helpful.