I'm not sure if this is the best place to ask this.
I've had repeated issues with stress on 3.5mm jacks causing breaks to the solder which means either rewiring or throwing the headphones out. Usually it's more sensible to throw them out and buy a new one considering the time commitment (I'm terrible at rewiring small devices like this, it's a minimum of an hour of work to get it right if it's a TRRS).
Here's a typical connector:
My first thought is to wrap it in several layers of heat shrink tubing at the connection between the TRRS and the cable. That area seems to see the most stress.
Skill level: basic soldering and that's about it. I have soldering iron, wick, solder etc. Perhaps the answer is to buy better equipment, but I've spent much more on IEMs and still had the solder point at the jack fail.