I was using my flux core machine on some pretty critical stuff the other day. I needed a watertight weld. I saw you were working on some pipe with a similar process. I am using .035 Blue Demon on my Lincoln SP125+. The crud, for lack of a better word, builds up on the cotact tip and periodically lets go and follows the wire right into the puddle. I can see it actually happen as I am welding. Wherever this happens, I get a nasty pore and sure enough, it leaks right at that spot. If I grind it out and patch over it it seems alright. I use a nozzle dip, and that almost seems to make the problem worse, because the residue lets go by itself rather than me periodically removing it myself. Any Ideas how to avoid this?

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