I haven't tried the Aloe or the hand sanitizer yet, but may try. Called vet, asked about Milbemite. Vet offered Acarexx; said same thing. I got it at $15 per cat (6 cats). Vet also had me continue the Revolution (about $8 online, per cat) but vet said - as I had read online but the vet didn't tell me this earlier - administer every 2 weeks (not monthly) during this, along with the Acarexx. Plus, expect to administer for another interim after this 2 weeks.
Don't know if the desert mites here are super-bad, or what. But this seems like a lot of treatment. I agree it seems to be needed. I hope others can solve more easily than I. Just letting you know what I have done. I appreciate the sharing, the support, the idea to find this vet solution - which I didn't hear from the vet...! I will check back. Much appreciation.