The ear is normally a self-cleaning mechanism. Wax acts in a protective manner, catching particles that may land in the ear. Fine hairs inside the ear canal constantly move wax and sloughed skin out of the canal. Wax and skin can build up inside the ear canal. If the canal is not clean, the eardrum can become completely blocked, greatly reducing hearing and eventually cause permanent damage. The best way to avoid an ear infection is to maintain the health of nasal passages. When certain harmful bacteria enter the body, they attach to the membranes of the nose and throat and onto the ear. By regularly flushing away the pollen, dust, bacteria, and other irritants that cause mucus build up in the nose, ear infection can be managed and avoided.