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> what about air purifiers/ionizers? do you know anything about that? 
I have not tried that yet, but it might work. There are bunch of things that I have not tried yet. Another thing that realized was really bad for me, where it was so bad that I could not almost breathe at all through my nose is when I used to leave on my PC over night, and the PC fan must have blown the dust towards me or my nose, which made it really bad. And another thing that improved it a bit as well was also washing the sheets more regularly and at high temperatures