Cerumen, commonly known as earwax, is a waxy, yellowish substance produced by the ceruminous glands located in the external auditory canal. It is usually expelled from the ear canal naturally. It is responsible for trapping dirt and debris and moving it out of the ear canal. In addition to protecting the skin of the ear canal from infection, it lubricates the eardrum, keeping it soft and pliable. Without proper lubrication, the eardrum is not as effective at transmitting sound. The presence of cerumen in the ear canal is not a sign of poor hygiene.