"Others have mentioned "not..." <- > <@jamesmunns:beeper.com> Others have mentioned "not enough flux", and I agree, the solder looks a little chunky. Definitely make sure the solder you have says it's "rosin core" or mentions flux, or if you clip it, you can see that the solder wire has what looks like a gel center, that's flux. > > However the flux cooks off the longer you heat it, which is why you want to work decently quickly, only or or two seconds of heat total per pad. If you heat it too long, or tap it too many times, the flux "cooks off", leaving you with solder that doesn't flow as well. I think this is one of the most common beginner mistakes. You keep going back in and making changes and doubting yourself, but you're just making it messier because you've burned up all the flux. Quick in and out is the way