Glad I found this thread. In January I had a severe ear infection which caused loss of hearing, and eventually after months sort of recovered but when I swallow I can hear a clicking sound in my left ear (like mucus is still in there). In July I had an audio gram as part of a medical which identified a slight loss of hearing in the left ear, however with a history of perfect hearing in all previous annual audio gram it was assumed due to the flight. Again in August I had another audogram which said the same. I've tried cleaning the sinuses, but now going to see an ENT specialist for advice. However since I'm here in the sandpit I like to be armed with the right info before I see the local doctors.