Along the line of need for hearing aids - Told here before, but bears repeating.
Long term background - Since I was a teen I swam frequently every summer up until about age 55. Then with the kids grown up and a heavy travel schedule I stopped going to the pool.
Then I had my first back surgery, went almost deaf in right ear, slightly deaf in left.
Went to HMO doctors, had a rudimentary ear cleaning, no improvement. Condition persisted, couldn't hear squat. Doctors started recommending hearing aids.
Went for another ear cleaning, this time they labored over me for about an hour, ended up pulling out wax that looked like a little worm about an inch long. They told me I had unusually deep ear canals.
For a few days my hearing was super sensitive.
Hearing restored. Now take longer showers with a few minutes for soaking ear canals.