Add... sometimes the eustachian harbors either fungus or mold or bacteria.
Some people up a cap full of hydrogen peroxide in each ear and let it bubble away for 5 minutes to clear it...
I have tinnitus since 2001. It’s irritating but I’m used to it by now. If I could cure it I’d be grateful. No mold or fungus that I know of, will try that just in case. It doesn’t hamper my hearing, just ads a constant ‘Hisssss” sound. Gets worse if I’m exhausted or sick.