Cerumol Olive Oil Ear Drops (10ml). Ear wax is an oily substance produced to protect the eardrum. The amount of wax produced varies from person to person but a build up of earwax can lead to partial hearing loss.. Olive Oil is a natural lubricant which gently softens and helps remove ear wax.. What is in the drops?. The drops contain only Extra Virgin Olive Oil; Superior category Olive Oil directly obtained from olives and solely by mechanical means. There are no other ingredients added.