Hot cold soldering iron When hot, "tin" the soldering iron s tip with a small amount of solder it, and remove the excess solder with the soldering iron if the joint looks fuzzy or dull it is a "cold & Micazo Bulllzz Hot cold soldering iron When hot, "tin" the soldering iron s tip with a small amount of solder it, and remove the excess solder with the soldering iron if the joint looks fuzzy or dull it is a "cold