I've tried to find an answer to this soldering skill, but it's probably so basic that it is taken for granted. I'm having a time trying to solder mulitiple wires to the back of pots. Is there a secret to this? When I try one at a time the previous wire disconnects as I add another. If I try multiple wires at the same time I end up burning my wife's hand as she tries to hold the wires in place. Help save my sanity and marriage!