I'm sure the reason my hearing is still good is that my ears produce a lot of wax.
I had my ears syringed once and the result was great, although I think I probably got rid of most of the wax before it was done using drops of olive oil.
On the walk home, every step was accompanied by a 'boing' sound as there was obviously a bit of water left on the ear drum.
I had the syringing done as the wax buildup had become so great that it felt like someone was poking me in the ear with a sharp pencil.
On other less severe occasions, wax buidup has affected how I hear notes whilst playing. One time playing bass, I would play one note but hear two different notes!
Steve.