Yeti tumblers yellow and white .. getting black edges on cuts

Newbie here. I’ve read 206 million posts and and YouTube videos and I’m more confused then ever

Trying to engage yellow and white yetis. I have tried a bunch of different settings and destroyed a few cups by now. I realized different brands require different settings.

Any recommendations with xtool d1 pro 10w? I have played with settings and have gotten decent results but the biggest issue is the coating burns off in the middle but is black around the edges… almost like it’s outlined or not cut clean. Cleaning after doesn’t remove it as it seems it’s the coating the is not cleanly burnt off .

Also How close do you set the diode to the surface?

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