Make sure you’re using flux and don’t be precious about it. Flux it the fuck up. They sell non-corrosive flux that you don’t really have to clean up, but still not a terrible idea to clean it off when you’re done. They also have some handy flux pens instead of the typical goo in a jar.
Try not to inhale the vapors, even with the lead free solders. Shit ain’t good for you either way.