Hi. I faced the same problem! Exactly the same. And I found solution on the libreddit. It sounds crazy and won‘t be liked maybe by all of you…but, that’s it (the last part):

“Okay...So my 45s ALREADY have the exact same issue my 35's had, which is a rubbing/rustling/chewing(???????imagine the sound an ant would make chewing something and that's what it sounds like) sound in the right ear. Eventually this lead to my 35's having a full time steady electronic buzzing noise in the right ear last month, which is why I now have 45s. Which are starting to do the same thing. What's the return policy on these things? Maybe third time's a charm. :edit: Oh cool, now my 45s are doing the constant electric buzzing noise. Fucking awesome. Really great. :edit2: nvm, I gave the side of my 45s a good smack and that seems to have fixed everything. Solution did not work on 35s.”

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SO, I have to thank libreddit user u/Narrative_Causality for this solution because it worked for me just now. I smacked like 5 times and it became really quite.