The 1st part of this Comes from @jbmanning5
You get a much cleaner and less charred cut when you switch from full power to 100 precision power and to passes. You can also increase then the speed slightly. An example is one that usually cots at full power with 1 pass at a 155 speed I increased the speed to 170 with the 2 passes. This also seems to reduce the kerf.
The 2nd part of this tip I discovered on accident. I was having trouble trying to cut through quarter inch Baltic Birch plywood. It was 5 ply. I did use similar settings as above only at a 150 speed. I would a lot of times get small spots that didn’t cut through.
One time I went to cut and it cut through perfectly and I realized I accidentally left the focused distance at 0.10" instead of .25"
Hope this helps!