Unscrew the lid and fill with half carrier oil (sweet almond oil, grapeseed oil, olive oil) and half with your favourite Bio Scents Aromatherapy Oil, replace the lid and hang in your car.  Our favourite Aromas to keep your car smelling fresh are Eucalyptus, Lemon, Sweet Orange or Peppermint. If florals are your favourite go for Geranium Bourbon or Lavender. Or if you prefer a woodier or more christmassy aroma Sylvester (Scotch) Pine, Cinnamon Leaf, Clove or Frankincense are your go to’s!