I don't have the iron you are using, but I feel your pain. Nothing is worse than not having a tool that is reliable and trouble free. I have not been pleased with my last two irons, and the one I am using now just barely does what I want. What I have noticed is that the expensive irons...of which I really only bought one....weren't any more reliable than the medium cheap ones.
I have decided that I expect too much from an iron.
I hope you get happier with yours.
Dina