I was practising my soldering skills, but i encounter some difficulties, and I hope somebody can help me with it. Thank you. 1. I heated up my solder iron, and applied a little bit of solder to it, tried to tin the wire. When I put the wire onto the iron and the color immediately turns kind of brownish color, and did not flow to the wire, but stick to the iron itself. did i do something wrong? 2. I managed to tin the wire with that brownish color solder, and ready to solder it onto my old hard drive. I first applied some more solder, and try to tap the point for quickly since i have a 30 watt solder iron, but the solder still doesn't stick to the wire, why? 3. I heard the turn flux, and i google it, but i couldn't find any answers to it, does that mean flux as well? 4. When I solder it to the point, but there were some liquid that came out of the board? Does that mean I heated it too much and burned the board? Please help me with these questions, I will be appricated. Thank you very much.