cheap soldering iron can do, but if you have more expensive such as temp control iron then its better. turn it on until it reach temperature, pass the iron through any unwanted string, they will dissapear like a whisper in the sky. thats it.
Quote vreihen
...starting with the retraction distance and speed.....
Sometimes I find I end up walking a very fine line. Too much retraction and I get filament jams, too little and I get a tiny amount of very fine stringing. I'll take a quick wave of a torch over a ruined print