Well, this is probably going to sound stupid but.. Have you tried Mayonaisse? It may be worth a shot, and rather inexpensive, as well as great for the hair.. (as a bonus
For some people who have lice, and want to go the natural route, instead of using pesticides, that the lice can grow an immunity to.. They use mayonaisse...
Get a large jar of "real" mayonaisse (not Miracle Whip).. two, if you have a LOT of hair.. and put it on real thick on your scalp and hair.. and then let it sit for a quite a while.. how long, I am not positive.. So, pick a time when you have a lot of time..
The mayo is so thick that the bugs (mites, lice, etc.. ) won't be able to breathe and will sufficate..
Thing is.. mites are not subject to just staying in the hair.. If you take a shower first, and make sure you've gotten then from every where else, do the mayo thing.. and then while you're waiting.. I would put some olive oil in your ears. for they may be there as well.. and since you got them from headphones.. might be where it started from..
As I am sure that you don't really want to put mayo in your ears.. only thing I can think of is oil.. to help suffocate them there as well, without it leaving a really big mess..
Hope this helps..