This is a mange treatment from way back n the day. Bathe him down in any type of oil. Used motor oil, olive oil, mineral oil. Crate him for fifteen to twenty minutes. This basically kills/drowns the mites. Then wipe him down. Wait a couple of days and repeat.

I have known people to mix permethrin in the mineral oil.

Most demodectic comes back. You may need to do something to boost his immune system.

Then use a 12 oz. bottle of Isopropyl Alcohol. Add two teaspoons of Boric Acid. Add 12-14 drops of genetian violet. Put it is a spray bottle. It is purple and stains everything. Use it for an ear and skin treatment, and then for a monthly.

The alcohol will acts as a carrier but will quickly evaporate removing some moisture from the affected area (ears). The boric acid will lower the Ph so both bacterial and fungal growth will stop. The genetian violet will act as a topical.

EWO