Essential oils are the best way to make your tea bath smell good. Usually, I add some Epsom salts to make up the bulk of my bath tea alongside other ingredients. I prepare my Epsom salts by placing them in a bowl and adding drops of essential oils. Shake/stir it well to evenly coat the mixture. For a batch, 10-15 drops of essential oil is usually enough for me but add more or less depending on your preference.