Love my diffusers! I use a diffuser where you jus add straight oils.....no water...jus your oils......they have 3 different settings on them....the time you want them diffused....the strength and how long you want the diffuser to rest in between each spray of oil!!! Want more information.....let me know....they are the best ones I have found on the market....they have portable ones you can take in your car!!!  Industrial ones.....big enough for churches, work spaces etc. Have several in stock....they are American made and from diffuser world