What exactly is flux? Where can I get some also? Ok I can sort of understand about the heat transfer and everything too, but I don't think it's because of that. Not in my situation anyways. Some of the resistors actually got the solder to stick on easily, but others just didn't seem to work at all. Well what about the different types of solder? Wouldn't different types help aid in better contact without it having to roll off of objects? Sometimes I even took the resistors and it would stick onto the soldering iron, on accident, and then that would mean its really hot, but still, the solder wouldn't stick onto it. Just rolls right off. Thanks for all you guys help. You guys have actually helped me a lot more than any other people in other forums because they just like to be asses by telling me to go buy the led's or asking other questions that have NOTHING to do with what I am asking. Oh well. Thanks again.