Here are safer things that can make your home smell better. Get a old tiny crockpot from thrift store, add water and turn on lowest setting. Add orange peels fresh or dried, lemon peels fresh or dried, apple peels fresh or dried. Herbs and spices like these cinnamon sticks, cloves, allspice, nutmeg, dried lavender, dried lemon balm, dried basil, dried ginger, ginger slices. Stir into the water and cover. Bring to simmer and slide the cover off center. Adds pleasant scent and humidity to the rooms.
You will notice that I said a old crockpot bought from thrift store, never use this for anything else other brewing this type of air scenting. You can ruin a crockpot that you use for cooking in doing this.