One issue I see newby TIG welders have is, not grinding the tip with a clean grinding wheel. And I don't remember what the wheel is called, but it is white.
Do you use the gas lens style diffuser or the standard collet-holed ones? All of the cups I got with the machine seem pretty small compared to the stuff I see when I watch videos on YouTube (weldingtipsandtricks.com). Those cups seem to be really wide and shallow. Maybe a bit easier to get into tight spaces too?

Found some diamond wheels on Amazon that might work for sharpening....or a dedicated tungsten sharpener in the $300-$1000 range!

-G




