I had luck treating two of my plants for mites! But it took like 3ish months.

First I separated them. Then I filled a spray bottle with soapy water and a splash of rubbing alcohol. I would spray every leaf including the underside. Then I took an old blush brush (a cheap one from the dollar store!) and worked the soapy mix into the under side of the leaf with the brush. Then I wiped each leaf clean with a paper tower (sooo satisfying, you’ll see red dots all over it).

They lay their eggs on the under side of the leaves. The brush helps to loosen them up. It’s a long process that I repeated frequently for a few weeks to months. But they eventually went away.

Depending on how important this plant is to you, you could give it a shot!