I consider myself to be well experienced with soldering techniques. Recently, however, I have noticed something occurring with greater frequency. 1 in every 15 solder joints a tiny smoking piece of particulate goes whizzing by at great speed, usually several feet from the joint. I'm using lead free solder and a 25W weller iron.
1. Is this common?
2. What is it? Flux? Solder? There is a smoke trail when I see it shoot out - that's how I identify it.
3. What can I do to minimize or prevent this? I wear glasses for eye protection, but it would be nice if there was something (tools, technique, materials) that I could identify as the culprit.