Solder comes in many sizes and compositions depending on the application. For electrical purposes, electrical lead free solder or electrical lead solder would be appropriate; the choice comes down to ...

they get lost and they tend to hold onto bits of solder. I actually prefer to use a paper towel instead. Either way, wet it down and give it a squeeze so it’s not sopping wet. If it dries out ...

Creative] has a soldering gun project doing just this ... We expect it to get hot, but the duty cycle on these devices in use is probably low enough to keep it from melting.