using a low wattage is the best choice... i personally use a 5w mini soldering iron... it gets into tight places. i have to let it heat up but it will never fry a pot. anything around 20-40 is pretty good. they heat up fast and allows you to apply the solder quickly. if you're not use to using a soldering iron they can make a pretty big mess though. i like my work to be nice and clean.