I got mine under control, though there is still a bit left that probably wont go away, but is totally ok for me. Got rid of my 2 main stress sources, changed to a much more healthy diet, drinking more regularly and if there is a new tinnitus attack (i still do not know the propper english word, in german its hörsturz) i do breathing and ear massaging for half a minute. Not just massaging the outer ear but also gently pumping with air pressure similar to adjusting after a flight. I noticed time is super critical here. Just before the tinnitus starts there is 1 or 2 seconds where you feel the hearing disappears its as if the volume is turned down. If the massaging and deep breathing starts in this moment before the tinnitius beeping and noise sets in, it seems to always go away completely after.