Too many chips can certainly cause ugly white smoke, and so can wet chips
The New MES GEN 2 really struggles for any intake air
If you pull out the chip loader, and look inside the hole,you'll see a tube with a slot along the bottom. When you slide the chip loader into position, there is very little air that can enter thru the chip loader.
Now, pull the chip loader out about 1/2" and rotate the handle 180°, so the dump tray is facing down
The slot along the bottom of the tube and the dump tray are now lined up
Pull the chip loader out about an inch, and watch the smoke from your exhaust vent increase
Without oxygen, you make charcoal
Add a little oxygen so you have proper combustion, and you can achieve TBS