Laser settings for white tumblers

I can’t seem to get the right settings on my Omtech fiber laser right when engraving a white yeti tumbler. Does anyone have any suggestions for a white tumbler, so the logo come out shiny, preferably in one pass? the current settings I am familiar with are:
Steps per rotation- 6400
frequency- 30
power- 90
speed- 350
run count- 2

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