I'm a plonker, took my gun apart to see if a wire blockage was there, dropped the washers and don't know what order they go back in!! One of them is an insulated washer so i'm sure it makes a difference!! Picture attached (and the complete one is when i put the washers back incorrectly!!)!!! It is a Sealey Mini mig...and i know, it's time for anew one!!!!!