I'm trying to replace the power socket in a netbook. There are 4 legs grounded to the shell and one positive leg on the connector. I've removed the positive leg and cut away most of the shell so it wouldn't be as much of a heat sink but the solder for the ground legs doesn't seem like it's even trying to melt; I've tried lots of flux with solder wick. I'm afraid of turning the heat up too high, is that the only way though? Any tips would be appreciated.