Surplus solder and unconsumed flux and residue is usually wiped within the soldering iron idea in between joints. The suggestion of your bit (generally iron plated to lessen erosion) is saved wetted with solder ("tinned") when warm to help soldering, and to reduce oxidation and corrosion of the tip http://beckettremqw.designi1.com/3062844/5-essential-elements-for-holder-wires