Regularly do this for prevention Mix in a squirt bottle. 8oz organic Witch Hazel 15 drops of Lavender 15 drops of Basil 15 drops of Geranium 15 drops of Arborvitae 4 tablespoons of Hydrogen Peroxide Shake before use. In the L shape of the ear squeeze in the solution, about 1/8 of a cup. With the ear flap down rub, rub, squeeze and squish for 30 seconds. With a warm paper towel pick up ear flap and clean out all the black gunk. The black gunk is yeast, debris and dirt. This is