Karin Herzogs unique formulations contain stabilized, active oxygen that reacts upon contact with the skin. Therefore, all Karin Herzog treatments containing active oxygen must be applied without massaging, with a brush for best results. Because the stabilized oxygen reaction is almost immediate upon skin contact, the use of the brush is essential for all oxygen treatments to work properly and most effectively. This will avoid the active oxygen being absorbed by the fingertips rather than the targeted area of application. Use to apply all Karin Herzog Oxygen products for the face. For ease of application, briefly moisten the brush under running water, as this will make spreading the treatment easier. After use, repeat this quick rinse. As oxygen is highly antiseptic, one does not have to worry about the brush being compromised. The oxygen in the treatments disinfects the brush with each use.