By Kamui2017-01-10 06:12:26No need to say much. I was one of those guys that tried to solder small small contacts on PCBs with the default solden tin wire.
NOT! Save yourselves ASAP use the solder tin paste. Just aply a small small ammount of this solution (yeah go buy a tool like this http://www.banggood.com/Metal-Handle-Hobby-Cutter-Craft-Knife-with-6pcs-Blade-Cutting-Tool-p-940100.html to apply) to all your ready to solder contacts.
Put the other part you want to solder and then just put close your solder iron.
By pogof2016-05-25 13:30:06They should have very short shelf life and they should be stored in fridge but I didnt test how good it is working after transport. And for that I would recomment to try to buy some paste locally and if you cannot find anything then go for this.