Using a sharp knife, make a small cut in the eraser, then pass the component lead through the slit whilst applying pressure to the sides of eraser. Simply rubbing PCB solder pads with the eraser is sufficient clean them. Insert the component in the PCB and bend the ends of the leads over so that they lie flat on the PCB and in the direction of the PCB track leading from the pad. Cut away surplus component wire with sharp wire-cutters. It is most important to make a good mechanical joint before soldering.
Excessive solder looks unsightly and can hide bad joints.
The correct amount of solder is used when you can see an impression of the component lead in the solder, yet the solder has flowed over the complete component lead and the PCB pad. The joint should have a smooth mirror-like surface without spikes or mounds. Before applying the solder to the joint, wipe the tip on a slightly moist sponge to remove oxides and excess solder. Apply a very small amount of solder to the tip of the iron so that there is a very thin film of solder on the bit. Apply the soldering iron to the joint so that it touches both the component lead and the PCB solder pad.