It is often quite difficult to find a nice smelling car air freshener and most of them have no tester on the shelf so you don’t really know what it is going to smell like until you have bought it and it is too late. Try cutting a shape out of some thick craft paper or felt and soaking it in a few drops of your favourite fragrance or essential oil. Punch a whole at an edge and tie a ribbon or thread around it for hanging. You will already know you like the smell and it is reusable, just add a few more drops when the smell starts to fade.