Did some casting yesterday for .38/357 rounds. Melted down 10 pounds of lead flashing ingots with about 2 pounds of linotype. Go to start pouring, and the nozzle of the spout glogs up. Had about 800 degrees on the pot as measured by Lyman digital pyrometer...but could only get an inconsistent dribble most of the time. On the full open setting I managed to get a half way decent flow, so I used that to fill up ingot molds and emptied the pot. Took the valve stem out and used a MAP-Gas torch to melt what little bit had hardened in the nozzle and then chased it out with a little Yankee push drill bit. There seemed to be some ash built up on the edges of the pot and around the nozzle. Remelted everything and had no problems pouring my bullets after the cleaning. This is the first time I've cleaned the pot in 10 years since i bought it. Anybody got a good way to keep this from happening again? Normally when I'm done with casting, I just leave the lead mix in the pot.