Here ya go. This is the same thing as the Blue Power Bobman was referring to.
This works well to keep the ears not only dry, but to treat yeasty ears as well. You can find most if not all the ingredients at a Pharmacy. The one ingredient that you possibly might have trouble finding is Gentian Violet 1% solution. I found everything I needed at a Wally world pharmacy.
Ear Cleanse Formula (Purple Stuff)
16 oz. bottle isopropyl alcohol (or witch hazel) I like Witch Hazel
4 tablespoons Boric Acid Powder
16 drops Gentian Violet 1% Solution
Mix all ingredients in the alcohol bottle & shake. (make sure you shake before every application).
Treatment: Fill ear with solution & massage gently for 30 seconds and wipe with a tissue. Fill a second time and just wipe without massaging. The dog will shake the excess out. Be careful, the Gentian Violet could stain. I use a eye dropper to fill the ear.
Treatment for yeast infection:
2 times per day for the first 2 weeks
1 time per day for the next 2 weeks
1 time per month thereafter
If you are concerned about the alcohol burning the inside of the ear (it could if the dog has been scratching its ear), then you can substitute the alcohol with witch hazel.
All ingredients are available at a pharmacy. The Boric Acid is usually in the First Aid section where you find the alcohol. The Gentian Violet will be the hardest to find and may need to be special ordered.
BE CAREFUL WHERE YOU USE IT, GENTIAN VIOLET WILL STAIN ANYTHING IT COMES IN CONTACT WITH !!