I'd been having problems welding lately & was starting to wonder if I'd lost my touch! Something was wrong & I finally took a closer look at my mig gun & it was frayed where it went into the machine! My rig is about 12-15 years old so I wasn't really surprised so I ordered a new Miller gun that replaced the old one & boom... I'm a real welder again! The new gun had an improved section where mine failed & the unusual thing is... the new gun was cheaper than the old one! 
BoB
BoB