It’s unclear whether demodex is causing the oozing yellow crust disease. Almost everybody on Earth has demodex on the skin, so maybe it’s better not to focus on them too much, but to focus more on the solutoins that seem to work for the people here. If you have lesions that clearly look like What does it look like? (photos), then I would suggest to try Soolantra and/or Sudocrem.
I did use Permethrin myself, but it didn’t help. I would also recommend not to try it often, because it’s neurotoxic.