Is there a safe home treatment for ear mites?

Dear Most Esteemed and Knowledgeable Kitties:
We recently adopted a 9-week-old kitten, Pip, from the local humane society.
The other night, I noticed that Pip has dark-brown-colored gunk in his ears (easy to see because he’s a pure white cat). I’m told that’s a sign of ear mites. It’s not a huge surprise, as Pip came from [...]