Thank you. I was just going to ignore that.
Some people you just know if their cat had kittens in the oven they’d insist they were biskits. 
This.
Ear mite killers are pesticides. They are poison to mites. In sufficient concentration they are poison to cats. In sufficient concentration they could kill you, or even an elephant. The trick is to use a dose that won’t kill a cat but will get rid of the infestation. Fortunately, mites are microscopic creatures, and we can do this. Just don’t overdo it.
Another yes for taking your kitty to the vet. I have a 7 year old tortie that finally had to have her ear mites treated at the vet after about a year of me thinking I could do it with pet store grade medicine. I would think they were gone and the symptoms came right back. And she hated the treatments despite my best efforts to make it as pleasant as possible. The vet did a one time treatment with some kind of gel he squirted in there, and she has been a much happier and friendlier kitty since.
I feel bad I didn’t take her sooner.
Chorus: “Go to the veterinarian”
Go to the veterinarian.
I had that problem too back in December. A new kitten infected another resident cat. What’s likely to happen is that the vet will give you a tube of anti-mite liquid and you’ll have to put about 10 drops into each ear each day for 10 days. The cat will not like it. Do it thoroughly, making sure to get the crevasses inside the cat’s ears. A q-tip might help if you’re careful to use it on the outer ear. Otherwise, the liquid might have a difficult time getting into the folds of the outer ear.
I read up on the mite lifecycle and decided to use 10 drops in each ear every 2-3 days for a longer period of time. It worked. The important thing is to be generous in applying it and to do it for an extended period of time. You need to kill all the mites you can. You won’t be able to kill the eggs so you need to give them about half a week to hatch then you apply it generously again. Then you do it again in case you missed any.
You may need to do this with any other pets you have.
Mites don’t live long without a host so you may not strictly need to wash places the cat has slept or laid down but why take the risk?
Quoted myself for those that missed it the first time around.
He went to the vet last Thursday and they cleaned out his ears and recommend Revolution, which I have ordered.
I hope the bad things I read about it and the bad effects on some cats are crap. The vet offered nothing else.
Sorry, I went straight to commenting after reading your OP.
Hope it works out. Keep us updated (and post pics of said kitty, Imgur is easiest to use).