The iron layer was added to prevent the tin in the solder to dissolve the copper of the tip, which used to be a significant issue. The iron layer is a poor thermal conductor, and should be kept as ...

To avoid this, use a rosin flux on the wire strands you solder together. Keep the tip of your soldering gun clean by wiping it with a damp sponge before and after every use. Applying a soldering ...

Push the tip of the magnet wire a small distance into the molten solder and hold it there for a few moments. The solder will bubble away the enamel and tin the copper underneath in the process.