I use them a lot for cleaning- mix some hydrogen peroxide and lavender oil, sprinkle a little bit of baking soda on the stains and you've got yourself a great little mattress stain remover solution (just don't forget to vacuum the residue!).
My mother in laws home always smells like fresh Eucalyptus. I LOVE it!
So now I'm officially looking for essential oil brands and diffusers. Any recommendations?? I'll share my findings soon!!