210 EXT creeping amperage...

I have had my 210 EXT for a couple years now and love it. I recently noticed when welding in ac or dc if I use full pedal some times the amperage will creep up by slowly 1 or 2 amps at a time. So if im not paying attention it will be 15 to 25 amps higher than what I started with. I have noticed it does'nt seem to do this when the pulser is on. I am wondering if anyone else has had this happen or if its normal ?

When was the last time you disassembled it and cleaned it out with compressed air? If you haven't done it in a few months, do it, and reseat all the electrical connectors.