Do they have batteries? And what is it like when those batteries die?
This past week (today and yesterday) I was doing some TIG and seemed to get occasionally blinded by nasty green light. To the point where I could not see anything close to a puddle. I got through some of the easy bench work, but even other easy stuff started giving me problems. Battery? It just seemed like I just needed to strike the (HF) arc and buzz about the area to burn ? away?
Was also doing some MIG and had my own problems there with chicken poop, but as that machine has a different helmet, no vision problems. Maybe try that bucket with TIG?