The best essential oil diffuser for you is right around the corner! (geekwrapped.com)
If you are using relatively thick pure essential oils or have not used your essential oil diffuser for a long time, then you will need to do a more intensive cleaning. (organicaromas.com)
If you wish to scent the area, use an essential oil diffuser with a relaxing scent (lavender is a good choice). (mindbodygreen.com)