What to do with headphones?

Question

Headphones

I bought Meizu EP-21 HD earbuds about 5 months ago. There were no problems or complaints, everything was just perfect. But a couple of weeks ago, an unpleasant situation appeared: the right earpiece started playing somewhere at 50% volume. I thought for a long time what to do, because. Under warranty, I will not return or exchange anything. And here it is not clear what the problem is, they played perfectly, put it in my pocket, take it out and then this unpleasant surprise. There is no physical damage, the wires are in place, they didn’t twitch sharply, they didn’t pull.
A way out of the problem was found by diligent study of the network. They wrote on the forums that it happens, it gets clogged, just small debris or earwax (sorry for the details), it helps if you dip it in alcohol for a few minutes, specifically the hole itself where the sound comes from, the alcohol will dissolve quarrels in the protective mesh and everything will be top. But it concerned only vacuum headphones.
Without hesitation, given that the headphones can no longer be helped and the guarantee is still dead, it was decided to try the method, yet an attempt is not torture.
I poured alcohol into a small container, dipped the side of the earpiece there where the speaker was, about 2-3 mm. And about a miracle! I took them out after a couple of hours (an attempt for a few minutes, as in the manual, did not give results and it was decided to wait until the ethyl had completely evaporated) and they were like new. No complaints.
I was happy and satisfied, but soon (about a week later) the problem recurred, the solution is the same. Again the question was removed, but this morning, I'm sitting at the laptop, listening to music, after an hour or two of use, again the same problem.
I understand that physically clogging will not happen so quickly, recently they are only at home, ears, sorry, I clean them properly) On the one hand, I don’t want to throw them away, 300 UAH is also money, on the other hand, this incomprehensible problem is tired.
P.S
I use them quite often, a day from 2 to 5 hours.

Answer 1

Maybe the clearing effect occurs due to a break in the use of headphones, and the problem itself is somewhere in the ear?

Answer 2

It is possible that the ground contact has come loose on the plug.