I’ve been trying to work with Lulzbot support for months on this issue but have gotten nowhere. Partly because of their lack of responsiveness.
Anyhow, I’ve got a TAZ 6 and I’ve started to have some odd first layer lines formed over the past 6 months. See the attached image. This is with changing the Z-offset from 1.18 on the bottom, to 1.19 in the middle to 1.21 on the top. No change. And yes I’m saving the setting between adjustments. I’m printing PLA and have tried ranges from 190-205 on a 60c bed. The higher temp seems to help but not much. Thoughts?