Maybe give the tool and helmet a white outline too: easier identifiable
and another idea would be to mix into the question mark an electrical spark but that are only some random tired ideas.
That are like the only things i found to edit, not sure if it is improvement

I added a couple more. 👍

Almost anything is better than the alien

Thanks all. I'll leave it a week and then gather the submissions for a poll.

PLEASE ADD YOUR ICON DESIGNS TO THIS POST, INCLUDING ONES YOU HAVE POSTED IN OTHER PLACES.

If your soldering iron is sparking, you have a big problem