Amazingly, IT WORKS!
I cleaned them with a soft brush made for earbud cleaning, tried using an ultrasonic cleaner (the kind for watches—though I might not have used it properly), and now, while traveling and needing to replace my toothbrush, I decided to give it a try.
I dampened the toothbrush slightly with very hot water and made sure the bristles got into the earbuds. And it works! Honestly, it’s unbelievable, but it works. Give it a try—just don’t overdo it, but apply enough pressure and firmness. My issue was with the left earbud, and now both are working perfectly! 😁😁
Huge thanks to @marco_CdbTxbuDZP , You’ve saved me from buying a pair of Ear (open), at least for now!🤑