I am been experimenting with some essential oils. The good ones aren't really cheap (well some are more expensive than others, good sandalwood is HIGH!) and so I'm careful to not mix too many to start. My latest favorite I use as a linen freshener or to spritz lightly on carpeting is lemon grass and tea tree oil. It's smells reallly fresh, the tea tree kind of cuts the lemon grass. I really like the mixture. Just distilled water and then I start adding drops (I always get the kind with the plastic dropper inside the bottle) til it smelled right to me. I know tea tree helps kill germs and my little dog sleeps on my bed so a light spritz when neither of us will be on the bed for awhile just seems to freshen it without being overwhelming. Anyone have favorites they use? I just made a eucalyptus spray for a friend. I made it really potent and left some room at the top of the bottle so she could dilute more or add water as she was using it and it would still hold the scent.