We used to have Venetian blinds as I was growing up... Wow, what a pain in the ass to clean, and SO much surface area! I bet your bedroom looks and smells so different! Ours always did, even though both my parents can, did, and do, clean like pros. Their house smells only because they smoke and Dad constantly farts like a champ in their tiny place. Doesn't take much of that combo to impact the air quality...
While you were doing battle with the blinds, I have been in our office, ransacking and reorganizing and cleaning. I am still at it, as that room has wrap-around built-in bookshelves, and has been our catch-all room for an embarrassingly long time. I can rarely get in there as hubby works from that room M - F except for trips. And hubby and I don't exactly see eye to eye on a lot of things reorganizing, he being of the donate nothing/file nothing/organize nothing kind.
Mold on the dust?! Ewww! I have never experienced that. Heavy dust from city life, constant sand on the floors in NJ, but not that. Wow - Australia really is a special place. How many sleeps now, badger?
I have a mantra that I have spouted for years... "If I eat right, I feel right. If I feel right, I exercise right. If I exercise right, I think right. If I think right, I eat right..." Phil-SC