Aside and on top of the permethrin i boil water about 2.5 gallons and throw it into the front loader with borax, oxyclean, neem and regular detergent. This is what's helping. I do think it's the internal infection that takes precedence but the less outside influences the better. I feel that like ecoenvironments these parasites set up a sort of comfortable environment for themselves and send to each other. This is why my back starts to pulse when i open my used clothes bags or touch the clotthes that hasn't been properly washed.
How did you manage with furniture. I currently sleep on a vinyl covered bed, no sheets, no pillow. Electrical blanket covered with a nylon like fabric to keep warm. It makes a big difference and i don't have to wash sheets.
Everytime i get close to my washer i feel this tingle of pleasure. It's the herxheimer sensation you may feel when there's a slight dieoff. It's definitely the environment plus the interior work that can heal.