Hello, I recently had a tig job on 1/8 steel tubing.Welder has been sitting unused for a year or so. Worked fine when I used last. Material was degreased,sandblasted and hit with disk and wiped down with acetone. I have no HF start. I can touch off and go but something is not right. Welder was tryed at 70 to 120 amps. Foot pedal.It set at HF start. Is there something I can try to clean up or am I screwed? This was repaired once for No HF start. Out if warranty.