Think of it like this: rubbing the bite with alcohol effectively dislocates (and inebriates) the biting entity, moving it about an inch
down your arm before allowing it to resume biting your arm. If you do this frequently, you might get first hand experience with the quirky phenomenon known as "quorum sensing" whereby the little harpys reveal their telepathic abilities to feel and register their sisters pain.
Re: rooms. When you exit a room, you are abandoning dozens of "sheds" in that room: bits of dander/offal that are mostly grow your-own-parasite-kits. If you do not re-enter the room for a while, and/or air ducts are blocked, the lack of air circulation in this space allows spores to grow like little trees upon the original piece of dander (called sporulation), such that the next time you enter the room, the spores are a hundred times more plentiful and you get reinfected by entering and disturbing that space.
If you are "treating" effectively, you might shed excessively (I call it "raining"). I've left trails like breadcrumbs on the floor. It can be disconcerting, even when you know it's to be expected.
Best chance for reducing them in environment: vacuum. Everything including walls and surfaces, ceilings. You will quickly conclude that a minimalist lifestyle is preferable to constant dusting.
You are reducing the NUMBER of spores coming into contact with your external skin layer, which = reinfection. High quality vacuum and air filter would be top priority items.
baths, eating cruciferous veggies (kale, broccoli) and reducing contact with harsh chemicals (incl. pharmaceuticals) are ways we can support our immune system to keep fighting the good fight.