OK, so I have a semi related question.? I am using a HAKKO adjustable temp soldering station,? But I have to push up to 700-750 degrees F to get my solder to flow even then its a bit "iffy" at times. ?? What am I doing wrong?? Its Kester 24-6337.8800 50 Activated Rosin Cored wire Solder roll. 245 NO-Clean 63/37 Alloy. .031" dia.? Is this no lead solder?? I assumed it was 63% lead and 37% tin, but now I see it says 63% tin and 37% lead.? Any suggestions on a better solder brand or formula??