> Get leaded solder when possible. It's easier to use and joints are a lot less subject to tin whiskers.
If you do use leaded solder, be extra-sure to wash your hands after soldering.
If you do use leaded solder, be extra-sure to wash your hands after soldering.
Just don't put the solder in your mouth and wash your hands.
Here is one stack exchange answer that seems well researched to me: https://electronics.stackexchange.com/a/19086
I also did a lot of googling on the subject recently when I decided I wanted to try out Stained glass, but wasn't sure what precautions I should take. I've come to the personal conclusion to not stress about the lead in solder.