Did someone say mood-lifting magic? Trust tea tree to do the trick. Tea tree oil has natural antibacterial and antifungal properties, making it a popular choice to beat the humidity. Apart from using it as a stand-alone fragrance by diluting with a carrier oil like almond or jojoba, you can also layer it. Tea tree has a fresh, herbaceous scent that blends in well with citrus-based essential oils such as lemon or bergamot. P.S. Add only a few drops of tea tree essential oil to your carrier oil or lotion as it is quite potent. Do a patch test before using in its diluted form to ensure that it does not irritate your skin.