The best way to completely get rid of this smell is to get rid of Mange forever. Keep your dog and its surroundings clean. Take it to vet for its proper treatment. As a home remedy take water and mix sulfur into it. Take one part of this solution and mix it with one part Calamine lotion. Mix it in a big pot and add one part of Aloe Vera liquid. Add clean water into it and stir it on low heat. Give it bath with this solution and let it dry itself by air. It will take a month, maximum, to recover.