[Jason Billows]

During the colder months of the year in Ottawa I dive with cotton in my ears. It keeps the water from rushing in and out of the ear too quickly, but also helps to keep the water around the ear warmer. I think that helps the ear and eardrum remain more flexible in the cold also helps to prevent bone growth.

One of the divers around here also used to stick small straws into either side of his hood to prevent hood squeeze.