Telsza, it took me ten years to find something that gives me relief and restores some quality of life.
If you have skin parasites (yellowish ear drainage does not sound like skin parasites), it will take AT LEAST a year for you to get them to move from your facial/head cavities. Maybe try the reverse, soak the top of your head only in whatever you have used for your body baths and see if things move downward and more toward the surface. Some people here took levamisole and reported that it caused parasites to surface the skin. I am not recommending it, as I never took levamisole. Just some ideas.
I have no cure, but I wish I could help you. You can't give up, it took me a long time to get control of this affliction.