When I was taking electronics training, my soldering instructor told me most of the lead exposure was that people used to lick the tip of their soldering iron b

When I was taking electronics training, my soldering instructor told me most of the lead exposure was that people used to lick the tip of their soldering iron before starting heating it up, and this exposed them to lead. Now most people don't do that, but older solderers are a little... off, if you've ever met any. Rosin flux fumes are also bad and you should definitely be working under a fume hood if you do any significant amounts of soldering, even at home.