“I’ve got the correct polarity, using the correct type of tungsten, have checked for correct balance, and even checked for drafts around my TIG work area, but I’m still having problems with my tungsten burning up and contamination in the weld. What’s wrong with my machine?” If a customer is saying this to me, it sounds as if he is on the ball with his diagnosis attempts, and is trying to do his/her due diligence when isolating the problem.