Using these 2-pin wire joints is a breeze. First, press the curved arm to open the apertures. Then, insert your wire into the mounting hole. Release the arm, and it'll hold the wire firmly. They work with wire gauges from 30 to 16 AWG, so you don't have to worry too much about the wire size. Both solid and stranded core wires are compatible. As for maintenance, keep them dry and clean. If they get dirty, you can use a dry cloth to wipe them. When not in use, store them in a cool and dry place. Just be careful when handling to avoid bending the arms too much as it might affect the fit of the wires.