Diffuse essential oils in steaming water on your stove, or over a tea-light candle, to purify indoor winter air. Essential oils are antiseptic & most are antibacterial as well, so adding some to the air you breathe is a great idea! Essential oils offer natural aromas too.. nothing synthetic or perfumy. Personally I like adding a few drops of Cold & Muscle Rub Concentrate to boiling water each morning. The camphor, menthol & ginger sure smells great & keeps us all healthy!