I went to Maui and got tossed around in some big crashing waves. One time a bunch of water, and probably sand, got shoved into my ears by the force of the wave churn. I was pretty deaf for a day or two, but then eventually woke up one morning with black ooze all over my face and pillow, perfect hearing, and my tinnitus was gone.

I also dramatically reduced eating cheese and anything with lots of gelatin or thickeners in it.