The chemicals have to be in contact with each other in order for any type of chemical reaction to take place. One of the most common examples of a chemical reaction is the rusting of a fence. The combining of the metal and the oxygen causes bonds to break and new ones to be created, which results in the creation of iron oxide or rust.
The ear canal cleans itself with a waxy secretion called cerumen. Cerumen is resistant to water, sticky (to trap dust) and migrates out of the ear canal to self-clean the ear. Sometimes, the wax builds up and causes symptoms, including mild deafness and a sensation of fullness inside the ear.
Earwax is a substance secreted made by the tiny cerumen glands, located within the skin of the ear canals. You will be surprised to know that the main purpose of the wax is to provide protection to the eardrum and ear canal. It is an integral part of the self-defense system of our body. How Does Earwax Build Up.