Hi, I have checked a few sites on the net for soldering help, but don't see the answer to my problem. I am using a 30 W iron from Radio Shack, and rosin core solder. The problem is the tip gets a build up on it after a few uses and no longer conducts heat. How do I prevent this ? I realize this is probably a trivial question to the pros, but I didn't see anything on the web on how to prevent this or what I am doing wrong. Thanks in advance, Kevin -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads