Tea Tree oil acts as a suitable agent to disinfect, reduce bacteria, and is anti-fungal and anti-viral. Lavender oil also disinfects, soothes and provides a relaxing scent. This is a great recipe for keeping your brushes clean between daily uses. Method: 6 drops tea tree oil, 4 drops lavender oil, 60ml water Add your oils into the spray bottle, top with water and mix. To use: Spray onto your makeup brush a couple of times and then brush it off onto a tissue or cloth.