[bff]

Another thing left out is solder flux. Some surfaces might be too small or too hard to reach and heat with the iron so I put flux onto the surface first and it causes the solder to flow into that area more easily. For instance, if you want to solder a thin wire into a small hole getting the solder to flow into the hole around the wire is difficult. If you put some flux onto the wire first and then slide it into the hole the solder will flow along the wire and will fill the hole nicely.