Hi
longlyeagleThanks for your sharing. And yes, your method might work.
The issue of headphone icon stuck can be cause by various reasons, a common reason is the earphone port had too many debris, so that the port keep detect debris or moisture. For people who faces the same issue next time, you can also try to clean your port with the compressed air can or put the device with the dehumidifier for a day.
Notice: I've heard some people will use hair dryer as the dehumidifier, please don't do that. The heat of the hair dryer may cause other issues unexpectedly.