I mixed 6 drops with lime drops and added 1/2 cup of distilled water. Then I added some of this mixture into a nasal spray bottle. It was not bad. It did not hurt. It also did not help my particular problem. It's pretty obvious to me that the fungus has penetrated deep into the sinus tissue. It is going to take more than a nasal wash or spray. It's going to take time to cure this.