What can we do ?
Freshener the air only? not that simple.
When you feel tired that driving ,maybe Mint, pine , vetiver ,basil can help you Concentration, eliminate fatigue.
When you sleeping , Lavender, cedar wood, coffee, onion flavor may help you feel peace and quickly asleep.
When your wardrobe is not always open , Simple card air freshener may help you to drive the worm , and to prevent mildew.
Also, when is parties on you room , or your lover, is it Musk, ambergris, rose, ylang ylang, jasmine, tuberose, rosemary did not satisfied? I think "bring it more" will come out somehow.