Ear-Better-Oil may be considered a home remedy as all of its ingredients have many different uses. Tea tree oil helps fight bacteria, fungi, and viruses, infection. Calendula is used for dry sensitive skin. St. John Wort is credited for pain relief. Mullein is used for infections of the outer ear. Eucalyptus is used as a combatant for the effects of cold and flu. Only one to two drops per ear will do the job.