[header] How to use oregano oil to treat a respiratory infections [title] Add a few drops to a humidifier. [step] Inhaling oregano oil with steam may also bring you some relief. If you have a humidifier, you can use it to infuse your air with moisture and the aroma of oregano oil. 
Just add a few drops of oregano oil to your humidifier and breathe deeply. [title] Create an aromatic steam tent in your bathroom sink.