Image on left is from 4 days ago, but the pimple was slowly forming over around 2 weeks.
The goop was sticky, not oily. Earphones are Panasonic RP-TCM130.
I was not able to find an explanation.
Something to increase cable lifespan, lubrication, rubber disintegrating, sweat and earwax that somehow got into the cable, dielectric grease, SCP-1407, no clear answer.
At first I thought the wires just somehow twisted. Nope.
Oh great, all the sound is gonna leak out before it gets to your ears.
Makes me think of that shitty grippy rubber material on cheap mice that becomes gooey with time. I would treat those as euclid until further testing
Euclid??? The greek mathematician?
High resistance in a wire inside the sheath would generate more heat at that point, causing the plastic sheath to melt/bubble. So if the wire inside the sheath got damaged, pinched or some of the strands of wire were broken.
If you put the yolk into a cup of soil, you should have baby headphones within 2-3 weeks.