Thanks,here is a torch pic

Checked for leaks with rubber glove taped to cup and soapy water-nothing. I changed torches and problem went away. What could be wrong with my torch(CK-TL-18). I have tried both collet body and gas lens, have checked all fittings and hoses with soapy water. When I had a rubber glove taped onto the c...

Thanks for taking your time to help me. Great feedback. I'll try your suggestions

What causes this tungsten contamination?

When welding on dcen with argon, synchro 250,CKW 18, gas lens. I am getting a build up of "crud" on the tip of my tungsten (2% Thor.) it doesn't take very long to build up, and screws up the arc. I saw a video where Jody made an argon dryer. I've seen a lot of posts that dismiss the dryer ...