PrTv
100+ Head-Fier
It doesn’t really dry out. It’s very sticky. It seeps out from where the leather meets the rigid part.
How long have you had the phones until the ear-pads started to "rot"?
Can these ear-pads still be used (e.g. cleaned and put back), or the only option is to shell out $250 and buy a new pair? It wouldn't be good if that goop seeps into the driver!