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  It sounds a little strange, but my cousin cleans her dogs ears with Listerine.  It's a holistic method.  I am thinking about Googling this to find out the logic behind it.  Her breeder raises all of her dogs/puppies holistically, and gave them this and many other interesting remedies.  I in no way endorse this method because I don't know enough about it, but it's an inexpensive method that has worked for another dog owner.
 I'll let you know if I find anything out about this.
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