Well its confirmed, i bought a new thermometer put that and the old one in the incubator and the digital probe is nearly 2.5f out which means i was incubating at about 94f maybe even slightly lower.
Should have recalibrated at the start....... still you live and learn. Luckily i went with my suspicion and increased it for the final week and at least had an ok hatch rate
I'm glad you were able to get to the bottom of the issue easily! I hope your next hatch goes more smoothly!