I'm new to soldering, have watched videos and searched the forum. I cannot get two connected wires to solder together properly. I've have tinned the iron tip beautifully according to every expert video I've seen. The solder melts instantly on the tip. Once I touch the iron to the wires it might as well be 30 below zero. The solder will not melt on the wires, the iron, or probably even the sun itself for that moment. The iron is 100 watts. I can't figure this out! Please help a guy out so I don't run out onto the freeway.