I need some guidance on how to solder those tiny IC pins to their electronics board. I have seen some videos on YouTube where they basically slide the iron across the pins and they all solder perfectly without any bridging between them. How is this possible? Is there a capillary force involved? One would think sliding an iron across all the pins would connect them all in a circuit with the solder but it doesn't. Either way I'm working with really small pins here I believe about 0.3mm thick. Any help is appreciated.