well..............practice practice practice !! you have to play with the heat settings and wire feed settings to work with what you are welding. i was never a fan of the gasless mig welders. i bought the kit and a tank to use gas with mine. you have to get the heat and feed setting right for what you are welding. if the weld is building up too high try more heat or slow the feed down. if you are burning thru try less heat or faster wire feed. hope this helps some.