

The fumes could be improved and the tip is hard to see at the smallest size
Looks a bit like a pipette. Maybe make the handle a bit narrower and also use maybe 1 or 1.5 pixel width for the smoke lines?
Yeah it feels like a bit too much, although the cable adds to the recognizability and the smoke it better than in the first version.
Is the icon added yet?
Hmm, the first one looks more like an eye-dropper, the second one isn't very Material. I think we'll need to see some other options for this to get included. Moving it to the Backlog until that happens.
Most helpful comment
My take with some modified smoke from the smoking icon:
soldering-iron.zip